As one of the first employees at a small cellular phone start-up called Nextel, I gained firsthand experience in how a business grows from an idea to a company that, at its peak, employed many thousands.

To be successful, you don't have to have all this crazy start-up capital or a ton of knowledge. I think it's actually helpful sometimes to not know all the rules because that way it's easier to break them.

It's a special person - and personality - who can lead a start-up to soaring success and sustain that success for the long term. Apple co-founder Steve Jobs and Facebook's Mark Zuckerberg are star examples.

You know what this nation is? It's a disruptive start-up. It was a group of rich guys that got together and said, 'You know what? We're going to break away from the other countries and start our own country.'

At TechStars, I have the privilege of working with hundreds of the best and brightest start-up mentors on the planet. We coach our mentors to take a Socratic approach and to provide data rather than decisions.

Any dispassionate observer would recognize that on Day One, a start-up has no customers, and unless the founder is a true domain expert, he or she can only guess about the customer, problem, and business model.

We've seen that there are a lot of people out there - teenagers in Topeka, housewives in Long Island, millionaire Internet start-up moguls - that all want to connect with each other about what it is to be human.

I had a choice between working on Wall Street or doing consulting or working at a start-up, and I got a job at a start-up. I was one of the first employees there, and I did everything for them, and it was so much fun.

Start-up success is not a consequence of good genes or being in the right place at the right time. Success can be engineered by following the right process, which means it can be learned, which means it can be taught.

NAPA has been with me from winning two Daytona 500s, to missing races with a new start-up team, and back to victory lane again. The relationship grew far past that of just a sponsor, but more of a partner and a friend.

Putting more money into families' pockets will help them with the rising cost of living, and reducing the tax burden on business will help foster the entrepreneurial spirit of those who want to start-up or grow their own firms.

The change I want to see is a start-up environment where everyone, regardless of gender and background, feels welcome and safe; where sexual harassment or discrimination will not impede great talent from producing great impact.

The wind industry has made major strides over the past two decades, and they have proven their industry to be efficient and self-sustainable. There is no need for the taxpayer to continue to subsidize a wind start-up tax credit.

Even though it was a start-up with fewer than 20 people, and I was pregnant with my first child, the best decision I've ever made was to join Google in 1999. Worst decision? Deciding to get a puppy and a bunny right when the baby came.

I have always thought of myself as an inventor first and foremost. An engineer. An entrepreneur. In that order. I never thought of myself as an employee. But my first jobs as an adult were as an employee: at IBM, and then at my first start-up.

Most start-up companies fail and it is smart public policy to help entrepreneurs increase their odds of succeeding. But, the biggest loss to our economy is not all the start-ups that didn't make it: It's the ones that might have been created but weren't.

It's almost impossible for a start-up to compete on cash compensation, and it doesn't make much sense to try. A seasoned executive at a big company is going to join a start-up because he or she craves the opportunity to build something from the ground up.

With lower start-up costs and a vastly expanded market for online services, the result is a global economy that for the first time will be fully digitally wired-the dream of every cyber-visionary of the early 1990s, finally delivered, a full generation later.

Auctomatic was a compressed start-up experience, going from start to launch to acquisition in under a year. We spent a long time building the product before getting our first customer, whereas with Stripe we made sure we had paying customers from the very start.

Incredibly, oil and gas companies don't have to pay certain environmental costs that amount to small change to them, while an offshore wind project start-up is faced with fees that could mean the difference between building a wind farm and packing up and going home.

Back in 2001, my first start-up was mentioned in the 'New York Times' and 'USA Today.' I figured that would drive thousands of visitors to the site and tons of new business. Instead, only a handful of people visited our site, and not much business came of it at all.

The best start-ups might be considered slightly less extreme kinds of cults. The biggest difference is that cults tend to be fanatically wrong about something important. People at a successful start-up are fanatically right about something those outside it have missed.

The myth of the peachfuzz billionaire has emerged. This new Horatio Alger typically launches his first start-up in middle school, and somewhere between the campus computer-science lab and a move to Palo Alto hacks up a Web site where users provide fun or useful content.

So, Israel, for all its glory, has failed as a social country because it has not built a strong society, but a very weak one. We succeeded militarily and financially, and we are the 'Start-Up Nation' - but when it comes to social issues, Israel has failed. It is very sad.

There are a lot of ways to make people not like you, but one of the most powerful - if least fair - is to be really, really successful. Nobody resents the guy who just lost his job. But the guy whose Internet start-up made him a billionaire at 25? That's a whole different kettle of envy.

The biggest start-up successes - from Henry Ford to Bill Gates to Mark Zuckerberg - were pioneered by people from solidly middle-class backgrounds. These founders were not wealthy when they began. They were hungry for success, but knew they had a solid support system to fall back on if they failed.

The start-up life kept me busy and surfaced the problem of not being able to stay on top of my personal finances, which led me to invent Mint.com. I was working 80-hour weeks, and had done enough preliminary work and research to know I had a big idea: To make money management effortless and automated.

Launching a start-up, you need to get a lot done quickly. Every day is different. Everyone pitches in with everything. It's easy for the founding team to say, 'We're flexible. We all help out with everything!' But when it comes to making decisions - that flexibility can spell inefficiency and disaster.

If the founders of a start-up are considering selling it, I'd advise them to consider the synergies. Could the buyer give you access to something you don't have now, like a certain technology? Would it make your life easier? Are you looking for a change? Things will change, so you have to be ready for that.

To be a designer today is to be an entrepreneur. Whether you're a two-man operation in Shoreditch or a 3,000-person, vertically integrated brand, you need to have the wherewithal to run your business through investment, considering everything from start-up funds to your exit plan or what it takes to go public.

In the movies, you want a good story and characters that are honest, but you are also looking for a good director who can lead the ship. That's how we look at business. Everybody has a great idea for a start-up, and so do their relatives, and they tell me, 'You gotta build it.' I say, 'I have to believe in it.'

Believe it or not, the first spark for everything I've done today came down to me meeting one person in college who changed my life. A student named Anthony Adams who lived across the hall from me in our freshman dorm showed me what it meant to be an 'entrepreneur' when I saw him launch his own start-up company.

I consistently run into young adults who have quickly turned away from traditional jobs at great companies to try their hand at a start-up. I believe that some of this stems from the desire to strike it big like Mark Zuckerberg, but I also believe it is because starting a company has become far cooler than working in one.

The ventures that keep things light and fun, easy to understand, that have a compelling story, a sexy retail product, will have an easier time getting people to rally around them and contribute. A start-up doing something that's difficult to communicate or doesn't offer any kind of retail product will have a tougher go at it.

As an entrepreneur and investor, I prioritize construction and collaboration. Whether it's a five-person start-up or a global giant, the companies that are most productive are the ones whose employees operate with a shared sense of purpose and a clear set of policies for responding to changing conditions and new opportunities.

It's really rare for people to have a successful start-up in this industry without a breakthrough product. I'll take it a step further. It has to be a radical product. It has to be something where, when people look at it, at first they say, 'I don't get it, I don't understand it. I think it's too weird, I think it's too unusual.'

If you look at America, one of the great strengths of America is its university towns and the way a lot of their businesses and a lot of their innovation and enormous economic growth have come from reducing that gap, getting those universities directly involved in start-up businesses, green field businesses, new development businesses.

Whether through the introduction of a Universal Basic Income, or through developing ways to ensure that the self-employed, entrepreneurs and fledgling start-up companies have the support they need to take chances and innovate, the £500bn investment programme proposed by Corbyn responds to the challenges we will inevitably have to face.

When I joined Bill Clinton's start-up presidential campaign in 1991, I was confident that women would play an ever more important role, but I never gave a minute's thought to what would happen if we won. When we did - and I became the first woman to serve as White House press secretary - it changed my life. But it didn't change the world.

I like to compare the attitude and energy of an emerging start-up to that of the early hip-hop era. From working at labels like Bad Boy and Ruff Ryders, walking into the Def Jam offices, A Touch of Jazz and things like that, the vibe is that off making something out of nothing and making things work, and that's what I love about start-ups.

I would say if you have a dream - and whether that is you want to be some sort of artist, or you want to start a start-up or a business, anything that very much feels like it's uniquely yours and you may not be able to get traction going through traditional channels - the way to do it is to build it brick by brick on your own in microsteps.

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