Whenever possible, add resistance to your ab exercises with weight. Most people increase the load on exercises for major muscle groups but they don't on ab exercises. That's a mistake. Think ankle weights for leg raises or a 45-pound plate for crunches as shown here.
related posts
Yo, How Much Ya Bench?
The three-step plan for setting up for a bench press PR.
Tip: The Single-Leg Exercise You Need
Here's a leg-destroying unilateral move you've gotta try for strength and size gains.
Powerlifting Tricks For Regular Joes
I've come to the realization that not everybody is interested in entering powerlifting competitions, but they are interested in improving their training by using powerlifting concepts. So here are a few things I picked up in the powerlifting pits that you can use to reach whatever lifting goals you may have.
The 500 Rep Shoulder Workout
Change the look of your physique in 12 workouts with this insane (but intelligently designed) delt specialization plan.