Day 18: Bet on Yourself

Having trouble sticking to your training program? Put your money where your motivation is. In a recent Mayo Clinic study, people who received $20 every time they achieved their monthly weight-loss goal — or lost $20 if they didn’t — dropped nearly seven more pounds than those with no money at stake. Both dietbet.com and Gympact (for iPhone and Android) can help you pad your pocket by wagering with others on your goals.

For more 31 Days of Fitness tips, check here for a new one every day in December.