If you get stuck, get away from your desk. Take a walk, take a bath, go to sleep, make a pie, draw, listen to music, meditate, exercise; whatever you do, don't just stick there scowling at the problem. But don't make telephone calls or go to a party; if you do, other people's words will pour in where your lost words should be.
When I wrote 'The Giver,' it contained no so-called 'bad words.' It was set, after all, in a mythical, futuristic, and Utopian society. Not only was there no poverty, divorce, racism, sexism, pollution, or violence in the world of 'The Giver'; there was also careful attention paid to language: to its fluency, precision, and power.