Dry Brushing Your Teeth

Here's something you already know: girls are turned off by bad breath and yellow teeth. Here's something you didn't know: dry brushing your teeth before you brush with toothpaste reduces plaque and tartar buildup by 67 percent. Which means it's 67 percent more likely that you'll get a bar make-out this weekend! (P.S. Don't forget that a little swish of mouthwash goes a long way.)

Oral-B Electric Toothbrush, $110

Listerine Mouthwash, $5