No. 2: Strength Train
You can barely find time to do cardio, let alone pump iron. Besides, the machines are intimidating and you don't want to end up looking like a man. But strength training maintains and increases your muscle mass and decreases your percentage of body fat, Goldberg says. And because muscle is more metabolically active than fat, strength training turns your body into a more effective calorie burner. Recent studies show that it also helps prevent osteoporosis.

Secrets to success: Sneak it in, doing a few minutes a day here and there, no matter where you are. This, coupled with some half-hour sessions, will help you meet the three hours of weekly strength training that Borden suggests. If you're weights- or machine-phobic, try practicing some strength-training yoga moves, such as maintaining the plank pose, which is similar to holding yourself up during a full-body pushup. This makes your arms stronger and also works your back, abs, and legs. "I do plank in hotel rooms when I travel," Bloom says.

You can even strength train on the go. If you're standing in line, try her stealth move: Put your weight onto one leg, float the other foot off the floor and hold it until you start to fatigue a little bit in the muscles of the standing leg, then switch. "It's a small enough move that the people around you won't notice," she says, "but you're toning your thighs and abs."

No. 3: Eat Your Fruits and Vegetables
With your hectic schedule, you're lucky to grab three meals a day, much less all the servings of fruits and vegetables that health guidelines recommend. But to fight everything from heart disease to breast cancer to obesity, experts agree that you should eat at least five daily servings of fruits and vegetables -- nine being ideal -- in a variety of colors, which reflect different protective nutrients. One serving equals a piece of medium-size fruit; a half cup of fresh, canned, cooked, or frozen fruit or vegetables; a quarter cup of dried fruit; or a cup of raw, leafy vegetables.

Secrets to success: Goldberg throws a cup of blueberries in her cereal every morning to get two servings right off the bat. Somer includes at least two fruits or vegetables in every meal, like a salad with mandarin oranges, and then eats another as a snack -- say, an apple with peanut butter. "So no matter what, I get at least seven servings a day," she says. You can also sneak produce power into yogurt, soups, and smoothies by adding a powdered vegetable supplement. Borden spoons Udos Choice Beyond Greens (available at health-food stores) into her morning shake. "It's a great source of nutrients and fiber," she says. 

And remember: Fruits and vegetables needn't always be fresh. Somer stocks up on frozen berries and lines her cupboards with stewed tomatoes and tomato sauce. Nor do veggies have to be in a bowl, she says. You can layer almost a cup of lettuce or spinach in a sandwich or tortilla." Cooking or steaming vegetables makes them easier to digest and, therefore, helps you absorb more nutrients. Just be careful not to overcook them: If vegetables lose their vibrant color, they've also lost many of their vitamins.