Lay with your abdomen flat on your workout ball. Keep your legs further apart then shoulder length. Put your arms behind your back and lay back as far as you can. Go down to original position and repeat. Good to get rid of that muffin top.
This Bodyrock website is AMAZING! It is my workout bible, and best of all, its completely FREE. Tons of workout vids and plenty more to stave off ruts. Most of the routines are between mins long and that's all you need.