You don't have to schlep to the gym to boost your health, or give your metabolism a kick. Instead, incorporate these easy, fun strategies into your day. By Ava Feuer, REDBOOK.1. Pop gum in your mouthEven if you've told your kids to stop chomping on their gum, you'd be smart to keep chewing the stuff. Besides freshening breath, and sending a signal to yourself that you're finished eating, gum-chewing has a 150-pound woman blowing off 11 calories every 12 minutes.2. ...