Yes, celebrities pay personal trainers and private chefs thousands of dollars to whip them into shape, but there are some terrific lessons that we can learn from their routines – without paying a penny.

Jessica Biel used to follow every fad diet that came along. But now the secret to her weight management is to eat three small meals and three snacks a day to help her stay satisfied. She favors lean chicken, salmon or pork with a salad and brown rice or whole wheat noodles. “You have to find a balance, especially with what you eat,’’ Jason Walsh, Jennifer’s trainer,” has said. “She eats what she likes, but in smaller portions. She likes to have dinner out, but will only eat half of the food on the plate.’’

Jennifer Aniston exercises every other day. She has developed a routine with her yoga instructor, Mandy Ingber, which starts with 22 minutes of cardio to warm up her muscles before an hour-long session of yoga. The yoga session includes postures as varied as the one-arm balance, push-ups and pelvic tilts. Each move consists of 2 sets of 8 to 10 reps. Jennifer loves the workout. “Yoga has meant my legs got leaner,” she has said. “My arms got stronger.’’

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Angelina Jolie is back to her usual healthy eating habits after a work-related crash diet. Recently she went on a 21-day “detox” plan in order to lose 20 pounds fast for her upcoming movie Salt. She plays a woman CIA assassin who is forced to disguise herself as a man, and Angelina wanted to lose her curves. Since then, though, she’s resumed eating favorites like steamed beef, which is high in protein. She increases her good-fat intake by having salmon and tuna. And she never touches sugary foods.