Ever watch the Bravo TV reality series Work Out with trainer Jackie Warner? I've caught a few episodes and generally think Warner is a pretty cool gal. She has some cool stay-thin secrets too and shares them in Family Circle's October magazine. Here they are, some commonsense rules that guarantee success.

Set sugar limits Warner doesn't eat a serving of anything containing more than nine grams of sugar. Too much of this sweet stuff in your bloodstream makes hunger levels spike, and whatever isn't burned turns to fat.

Blend, don't juice When making your own smoothie creations, blending gives you pieces of whole fruit in your drink -- these have more nutrients and filling fiber than sugary juice alone.

Go Big Work your big muscle groups -- chest, back, butt, and legs -- and you'll boost your metabolism fastest. The result: You'll burn more calories. So when you're short on time, focus on push-ups and squats and let the burning begin.