Getting action hero abs takes being consecutive with your workouts. Some days you can't make to the gym and some of you action heroes out there don't belong to a gym so for you especially, I recommend an ab wheel. It's a cheap basic piece of equipment that works.
Here's a good video on How To Correctly Do Ab Wheel Roll Out Exercise
The Ultimate Ab Rollout Progression (BEGINNER TO ADVANCED!)
Keep those abs in shape, you never know when Chuck Norris might need your help in protecting the good old USA from a Russian invasion.