Summer is just around the corner! Get your body in bikini shape in 30 days (or less) with these fitness, weight loss, and diet tips. Method 1. Eating Properly. Know that many body types look fantastic in a bikini. Understand that there are 3, calories in a pound of fat. Cut out junk food. Eat frequent, small meals instead of 3 giant meals. Balance your diet with mostly carbs and proteins. Drink plenty of water.