What do you do when you have overdone it?
This answer works equally well for having overdone cardio, strength training, or cookie jar visits. Sometimes we need to rest from our exertions. Sometimes we need to rest from our vices.
If your hamstrings hurt, resting might mean taking a couple of Advil, doing a few gentle stretches, and taking a hot bath.
If your stomach hurts, it might mean taking a break from cheeseburgers or fries or milkshakes. Also watch out for the cookie-pushers disguised as elves or Girl Scouts.
Whatever you are overdoing, you now officially have permission to rest from it.