Get some sleep. This today at the Daily Beast:
When a person lies down to sleep at night, the brain undergoes a process that is crucial to learning, memory, and performance in ways that scientists are only now beginning to understand. Though the exact mechanisms of the brain remain unclear, studies have suggested that time spent dozing has helped research subjects solve puzzles faster, pick up new skills with better results, and think more quickly on their feet.
Prometheus Unbound 