Start your day on a fit note with one exercise that strengthens your whole body: the dolphin plank.
Lie flat on your stomach, and then push yourself up onto your elbows and your toes. You want your back straight, abs tight, and forearms on the ground. Hold your neck straight, too. Work your way up to holding it for 1 minute.
You can do the plank almost anywhere (beside your bed, on the bath mat, in front of the TV). Plus, it's easy for kids to learn. Get them planking in the morning, too.