Admit it -- brushing your teeth is so second-nature you barely think about it. But doing it right is key for a healthy mouth. It can help you avoid problems like cavities and gum disease. Sharpen your skills with these easy-to-follow tips: 1. Choose the Right Tool Just any old toothbrush may not be the one for you. Think about the size of your mouth, says Richard H. Price, DMD, consumer advisor for the American Dental Association. "If you are straining to open wide enough to let the brush in, the brush is probably too big," he says. It should feel good in your mouth and in your hand, so you’ll use it often. Know your bristles, too. If they're really stiff, they can hurt your gums. A soft brush is best. Electric or manual? "It's an individual preference," says Michael Sesemann, DDS. Price agrees. "It's not the toothbrush, it's the brusher." Electric toothbrushes can make it easier to do a better job, especially if you have art...