If you’re only using social networking sites to spy on your high school crush, you may be missing out on a weight-loss weapon. These sites can drive you to drop pounds faster, says Stefanie Barthmare, a psychotherapist with the Methodist Weight Management Center in Houston.

Facebook
Create a support group—other members with similar goals may push you to work harder.

Twitter
For every tweet you send out moaning you’re too tired to hit the gym, you’ll receive a flurry of return tweets from your friends giving you the support (or the taunting) you need to put on your sneakers.

iPhone
Download the free Walk n’ Play application from Apple’s App Store onto your iPhone and find out how many calories you burn throughout the day.