On the other hand, don't starve yourself, either, as you'll loose the muscle you worked so hard all season long to attain. As with everything else in life, moderation is the key. Do eat a healthy variety of foods. Don't completely deny yourself goodies. Just use common sense.
Exercise is important, too.
You could ride an indoor trainer if you have one. You could find a spinning class at a local gym or health club. You could cross-country ski. You could ride a mountain bike if you have lots of cold weather gear . Just find something that you like and that you will do several times a week.