I know the first step is to stop drinking so much beer, I'm working on that. But sit-ups I do for a few days and my back starts hurting like a mother F-er. I may be doing them wrong or trying to do to must to fast but I'm talking lower back pain out the waa zoo after a few days every time I try to do ab excersizes.

Any tips would be awesome, I always read great stuff hear about diet and excersize but just good ab info would be much appreciated.