Birth, death, and conflict - three things you truly can't avoid. Whether it's big or small, conflict eats into productivity and makes people feel stuck. Yet solutions exist for even the toughest situations with the most intractable people. The answer lies in better communication - not just using different words, but rather learning to think differently. I Hear You supplies proven techniques for stepping outside one's point of view and seeing things from other perspectives.
When it's time to ask your boss for a promotion or a raise, the conventional wisdom is to role play the conversation with a friend standing in for your boss to give you a chance to script what you want to say.