Stand Up Straight

One of the easiest ways to strengthen your abdominal muscles and support your back is through good posture. You may feel like you're standing straight, but in reality, most of us stand like the Leaning Tower of Pisa. Practice good posture by bringing your head and neck back.

The key element is breathing in, to tighten your gut. That's the component that lifts your chest and will give you Marine-like posture. Sucking it in while you do crunches, or even during regular walking, helps your body look and stay younger.