Hey - go talk to someone about that! I've had similar issues when I was going through a stressful time and I figure it was by brain's weird way of keeping me away and distracted from the stressor. It takes a while sometimes to figure out exactly what it is though. What you said did help though, especially #3, and also getting regular and enough sleep. But tackling the issue at its heart helps more.

A big help for me has been trying to fall in line with the natural circadian rhythm of sleep. Try to get to bed early, and make sure your room is as dark as possible. Turn off your computer and/or TV some time before bed (I hear recommendations of 30 minutes, I just try to go for ~15). Try to wake up with light, whether that's with a sunrise alarm clock that emulates the dawn, or the natural sunrise.

I really enjoyed this article on sleep optimization that was posted on HN recently: http://brianmartinek.com/2013/08/22/three-simple-ways-that-i...

Finally, working out is a tremendous help. Especially if you can try to do a workout that maximizes the release of hormones like endorphins and testosterone.