Read for 30 minutes before sleep. Not just articles, but a real, paper-bound book. Helps with sleep, learning, and reading comprehension in the future.
This combined with the other guy's "get a proper night's rest" is a tough one. I always try to read for a half hour, but end up getting absorbed and reading for 1 1/2 to 2 hours. I think I need to start reading drier books.