10. Go easy on the alcohol. Remember that alcohol is a source of calories. A 12-ounce beer has 150 calories; a 3.5-ounce glass of wine, 85. A margarita packs a bigger caloric punch. Even worse offenders are creamy cocktails, such as brandy alexanders and mudslides — equivalent to drinking a rich dessert. The bottom line: If you’re trying to lose weight, stick with water.