You can get a good base by just doing plan simple sit ups.
Thing is you need to hit every set upper, mid and lower also obliques.
You need to train them like any other muscle group, feed them and rest them.
Diet need to be low carb, low fat and high protien also tonnes of cardio. Bodyfat needs to be under say 12% which is very hard unless your blessed with good genes.
If it was as easy as the books and so on make it out to be, and how you seem to think it is, we would all look like greek gods.
That's really simplified version. But without knowing you, your build your physicality your metabolism etc etc it's hard to say.
Last edited by JoeE30; 09-12-2011 at 11:32 AM.