Reverse Crunch, My Favorite Ab Move

This Yahoo Health article claims the bicycle is the most effective ab move.

A San Diego State professor compared 13 common ab moves and determined the bicycle is the most efficient. When you use the bicycle move, you're moving continually, and you work abs and obliques at the same time.

Find more ab resources at these sites:
10 Most Effective Ab exercises
Flat Abs Fast
Celebrity Abs
Best and Worst Ab exercises

My favorite, the reverse crunch, is #7 on the 10 most effective ab list.

Keep moving, it's worth it.