7 Thoughts That Can Make You Thin

Old loop: I'll grab a candy bar to get me through my mid afternoon slump.

Switch to... When my energy flags, I need food that will help me go the distance.

Here's How: Candy and other sweets have little nutritional value, and they destabilize blood sugar, causing you to have more cravings later on, Gullo says. To head off a snack attack, he suggests, "reprogram yourself to seek out a mini-meal 30 minutes before you usually hit a slump." By eating before you're famished, you should be able to resist the sweet stuff and choose foods with enough protein, fat, and complex carbs to keep you sated and energized until dinner. Some of Gullo's top picks: bran crackers with low-fat cheese, a hard-boiled egg, or a cup of low-fat yogurt.

Next: Test your diet IQ