planks are excellent... try the ab caver pro... it really works... hanging knee raises (VERY CONTROLLED AND SLOW), layin on your back, straight leg holds and raises... hold your legs STRAIGHT OUT, while maintaining proper breathing patterns, and tighten your core as you hold for 20-30 seconds, sets of 5... swimming, running, cardio as well as stability training... do lifts while standing on a bosu ball for example, forcing yourself to tighten your core every lift..