I'm going through this behavioral cognitive therapy course on sleep right now. I've never been the best sleeper, and the concussion has made it worse. It's a bit better now but still relying on some ambien most nights to get me back to sleep around 3am.

This website is a mess, but the actual course info is pretty straight forward, just read a word doc every week and keep a sleep journal http://www.cbtforinsomnia.com/ It doesn't account for brain injuries, but it's good info and teaches good habits