I dance with someone who has amazing abs. Her entire body is completely toned but her abs are incredible. I asked her (maybe begged her) what she did to strengthen her core and she shared this move with me. You alternate legs and stretch as far as your leg can comfortably go, making sure your abs are pulled in tight and your shoulder are off the floor. I don't know why, but after I do this my abs look and feel tighter. Actually, it's pretty amazing what happens when I do this exercise. Then I ask myself, "Why don't I do this more?"
Do you have any secret "this is how I look amazing" weapons you'd like to share?