For all you gamblers out there I need some advice.. basically on dealing with fatigue. I have an 8-5 construction job and generally play pool in the evenings. Occasionally, I'll match up with a local that is a crack/crank head. I hold my own until it starts getting into the late hours. I've been up for 18 hours and am burning up energy focusing. But crankster head goes 'to his car' and comes back refreshed. Even if it's not this exact scenerio I'm sure lots of people have to deal with late night fatigue in general. What do you guys do out there to keep the energy up or other techniques for focusing?