The Tip: Teach yourself to drink wine ... in moderation.

The Study: Brigham and Women's Hospital

The Theory: Over a 13-year span, researchers found that women who sipped on a glass (or two) a day not only consumed fewer calories, but that women burn more calories after drinking than men do because our bodies have to work harder to metabolize alcohol). Bonus: wine is full of antioxidants that reduce cholesterol and blood pressure.

The Tip: Start increasing the number male invitees for your outings that involve food.

The Study: Indiana University of Pennsylvania and the University of Akron

The Theory: Researchers found women (and men!) ate less when dining with men than they did when dining with women. They attribute this to an increased awareness of established gender roles -- and be honest, as progressive as you may be, you're less likely scarf down your fourth slice or order super-sized burrito when there are guys around.

The Tip: Head to the ATM and withdraw a set amount of cash for the day and leave your credit card at home.

The Study: Cornell and Binghamton Universities

The Theory: Previous studies have found that, in general, we're more likely to overspend when paying with plastic because we can't see the physical money (cash) diminishing. Researchers at Cornell and Binghamton linked this phenomenon to our waistlines, theorizing that junk food purchases are often impulse purchases. When you have a set amount of cash withdrawn, you're less likely to blow it all on Snickers bars, soda and chips.