Crunches are not enough: These six moves target your deep abdominal muscles -- to keep your whole system looking and feeling beautifully balanced.
Doing push ups in this position is killer for the obliques! Aim for 30 reps on each side daily. Work your arms and your abs.
Audrina Patridge's Workout consists of 4 moves for a 6-pack. Two or three times a week, do one set of 20 reps of each move in order without resting then repeat the entire routine once or twice.