I have a 30-36 hour long day, and the only way I was able to rein it in and get to where I could sleep normally (I have a sucky non-programming related job that demands I be conscious from M-F 9-5) was to completely change my diet to a more hunter-gatherer style diet and start exercising after work.

On the plus side, i am now the strongest person at my workplace, which amuses me greatly. (Two guys will work together to pick up a 50" TV, I'll pick it up by myself just to freak them out, lol.)