You know you should go for the apple, but that chocolate muffin just sounds so much tastier for your afternoon snack...just say no. To give you a quick energy boost and tide you over 'til dinner, always choose the apple. It's got tons of belly-filling fiber and won't mess with your blood sugar—not to mention fewer calories! Or stock up on almonds, and prepare veggie and hummus containers to take with you to work for quick fixes.