Exactly what to order at Sonic Drive-In, according to nutritionists. Per serving: 480 cal, 22 g fat (3 g sat), 39 g carbs, 7 g sugar, 1190 mg sodium, 3 g fiber, 32 g protein.

Transition from whole milk to low-fat milk. Speaking from experience, only one of these things was easy. As my daughter turned 2 in January, we made the simple switch to reduced-fat milk. Done.

Whole milk has 3.25% to 3.5% milk fat, compared with 1% or 2% in low-fat milk and 0.5% in fat-free milk, according to the American Heart Association.