Some common things, none of which I have tried, except ZMA:
Chad's stuff +
Some people see effects, some people don't. Good luck figuring this out, and please post a review when/if you make a decision.
S. Emile Hughes
Current Lifts (December 2010): BW 166lbs; 285lb Bench Press; 315lb Squat; 175lb Overhead Press; 405lb Deadlift; 205lb Power Clean