Have you got a problem to solve? Try sleeping on it.
Our brains appear to continue working on problems even after we have gone to sleep. In one study, a group of people was allowed to sleep for eight hours before tackling a problem that had been described to them. Upon returning to the problem, the sleepers were almost three times as likely as the non-sleepers to find a solution to the problem.
Get 6 to 8 hours of sleep per night