If you're serious about your diet, you need to make drinking water a part of your daily -- or hourly -- habits. Doctors and nutritionists have long advised drinking six to eight glasses of water a day. But in 2002, the U.S. Department of Agriculture proposed a new standard: You should drink 0.06 glasses per pound (30 milliliters per kilogram) of your body weight, and if you live in a hot or humid climate, you should drink a bit more [source: USDA]. A lack of water results in dehydration, which can throw your metabolism off balance and put you at risk for weight gain [source: Nazario].
An easy way to make sure you're getting enough H2O is to drink a glass of water when you wake up, between each meal and before every meal. By filling your tank with water before you eat, you'll tend to be satisfied with less food. You can also get some of your recommended daily allowance of water by snacking on fresh vegetables or fruit instead of processed foods like potato chips.