Quote Originally Posted by B
do pull ups , push ups , situps and you will be ok.
make sure you look up the variations for push ups (there are about 10 major ways of doing them) incorparate all of the widths and grips (over and under arm) in your pull ups and don't just do sit ups to work your core.

Research into varous types of crunches, rolls, body raises, kicks, tucks and styles of runins and see what gives you the best burn.