You can do crunches till you're blue in the face and you still won't see your abs until you get your diet in line. Add in some cardio and watch the hills and valleys appear! Hill sprints, sled drags, and even plain old walking every day will get you there.
1) eat real food - more vegetables, moderate meat, moderate fruits, less grains, less sugar, less vegetable oils.
2) exercise - moderate intensity cardio, sprinting, heavy lifting, dedicated stretching and mobility.
3) live - relax, de-stress, meditate.
Disclaimer: I'm not professionally qualified to make any formal recommendations. I've just done my homework and I'm my own guinea pig. All of my data, unless otherwise cited, comes from a sample size of n=1 (me).