You overindulge on Thanksgiving and then vow not to do the same on Christmas. Then Christmas comes and the pies and cookies and peppermint-sprinkled cupcakes are too delicious-looking to resist. Then, a week later, it's New Year's Eve, and you have a few too many glasses of Champagne. And it's OK to enjoy all these things. It's healthy to not be so restrictive with your diet that you can't enjoy yourself.

But don't overdo it.