Relax, exercise and sleep more to boost creativity

Those who were allowed to sleep eight hours were almost three times as likely to solve the problems. Researchers think these participants may have thought about the problem during sleep.

"Not getting enough sleep decreases brain function, affects mood, memory and the ability to focus," says Amen. He recommends getting at least seven hours a night.

"Your brain is involved in everything you do," says Amen. "If it doesn't work right, you don't work right."