Tip 15: Gulp Water.

People who downed two cups of water before meals lost more weight thanthose who didn't in one 2010 study. Plus, drinking water can help edge out calories from calorie-laden beverages like juice,soda and even sweetened tea or coffee. Find out how much water youshould drink each day. For more diet challenge tips, meal plans and get-started guide, visit the Diet Challenge landingpage.