DietBet.com wants to help you make money while dieting. You can set up a challenge of your own or join another group. The competition lasts four weeks and the person who loses 4% of their bodyweight during that time wins. Celebrity trainers, gyms, HR managers, charities and others already have challenges set up on the site. DietBet is available for iPhone, iPod Touch and iPad. Read the full article.

We've compiled a list of apps that can help you accomplish all sorts of goals this year. Check it out and let us know if we missed any that you plan on using in 2013. Read the full article.

Ahead of his latest book launch "The 4-Hour Chef," Ferris is hoping to get to the bottom of why people fall off the wagon with their diets, and figure out how to keep them on track. His first step was to put all participants on the same low carb diet and exercise program. [T]wo groups are using online tools that claim to help people create goals and stick with them in different ways that hold them more accountable and then offer them rewards for their success. Read the full article.

DietBet is a four-week weight-loss game with major perks! Join an existing game or start your own. Then place your wager, big or small -- the more people involved, the bigger the prize! And everyone who loses 4 percent of their body weight gets a share of the pot at the end. Read the full article.

Having a financial incentive to lose weight could make you five times more likely to succeed, according to a study published in The Journal of the American Medical Association in 2008, which may explain the recent success of 'social dieting' Web sites that let you bet on yourself. When you lose the weight, you win the money–a classic win/win. 'Nobody likes dieting, but everyone likes games,' says Jamie Rosen, the New York City marathoner who founded dietbet.com, where you win a share of the "pot" when you achieve a weight-loss goal in an online competition. Read the full article.