Don't Skimp on Sleep

Health.com: The 25 Best Diet Tricks of All Time

"Get six to eight hours of sleep a night. Without it, the appetite hormone ghrelin increases, which could result in weight gain. And schedule at least two three-minute breaks during the day to practice deep-breathing exercises. It will reduce the stress hormone cortisol, whichbuilds fat around your mid-section."

—Manuel Villacorta, RD, author of "Eating Free"

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Back to Basics

A new diet arrives, another fades away. Should eating habits really be as fleeting as fashion trends? Let's face it: The best weight-loss strategies are the ones that stand the test of time.

Here, Health.com gathered 25 classic tips from their favorite health and nutrition experts. These simple strategies may not be as sexy as the latest fad diet, but they're guaranteed to never go out of style.

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Don't Skip Break...

"Eat breakfast. It'll energize you for the day and keep your diet in check."

—Mehmet Oz, MD, via Twitter

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Nibble, Don't Go...

"Use the three-bite rule with dessert: Have three small bites and put your fork down."

—JJ Virgin, author, "The Virgin Diet"

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Keep the Burn Go...

"During your workout, rest no more than 30 seconds between exercises. This will dramatically bump your calorie burn."

—Jillian Michaels, fitness expert, via Twitter

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Avoid Late-Night...

"Finish eating three hours before bedtime. Your metabolism slows down when you sleep so you shift from fat burning to fat storage."

—Mark Hyman, MD, author of "UltraMetabolism"

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Don't Forget the...

"Increase the strength component of your workout. Adding lean muscle to your body not only tones, it also increases your metabolism."

—Sara Shears, celeb trainer

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Question Your Cr...

"Before you eat, ask yourself, 'Am I hungry?' Unless a craving comes from hunger, eating won't satisfy it."

—Michelle May, MD, author of "Eat What You Love, Love What You Eat"

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Don't Skimp on S...

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Make Your Own Lu...

Brown-bag it. According to a 2012 study in the Journal of the Academy of Nutrition and Dietetics, dieters who eat out for lunch even once a week lose 5 fewer pounds on average.

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Train Your Brain

"Be specific about your weight-loss goal. The brain detects a difference between where you are and where you want to be, so when you're specific, your brain throws resources like willpower at it."

—Heidi Grant Halvorson, PhD, author of "The Psychology of Goals"

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Start with Green...

"Eat in the right order. Eat vegetables first to naturally have more of them and ultimately eat fewer calories."

—Dawn Jackson Blatner, RD

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Use Tried-and-Tr...

Take your cue from dieters on the National Weight Control Registry who've lost 66 pounds (on average) and kept it off:

-75% weigh themselves at least once a week.
-78% are breakfast eaters.
-62% limit TV to less than 10 hours a week.

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Snack Away

"Eat every three to four hours so you'll be equipped to say no to temptations."

—Pamela Peeke, MD, author, "The Hunger Fix"

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Be Goal-Oriented

"Set a tangible goal with a firm deadline—for example, schedule an 'after' photo shoot. It will help you stay motivated."

—Ramona Braganza, trainer who got Jessica Alba in shape for a photo shoot less than three months after Alba gave birth

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Steel Yourself

"Expect some discomfort. You're leaving your comfort zone of old eating habits. Knowing that it can be uncomfortable will help you get through it."

—Anne Parker, Miraval Arizona Resort and Spa

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Schedule a Cheat...

"Resist cravings by postponing indulging to a future day when you're free to eat whatever you want."

—Jim Nicolai, MD, Miraval Arizona Resort and Spa

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Take Notes

Keep a food journal. Women who do lose six pounds more on average, according to a 2012 study in the "Journal of the Academy of Nutrition and Dietetics."

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Use Your Arms

"When you are doing a treadmill workout, add arm exercises with light weights to increase your calorie burn."

—Jeanette Jenkins, celeb trainer

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Never Shop Hungr...

Always grocery-shop on a full stomach with a written list and a cart (heavy baskets trigger instant-gratification decisions, researchshows).

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Say No to Soda

"Put the soda down [and] step away. Regular soda drinking may make muscles less likely to burn fat."

—Dawn Jackson Blatner, RD, via Twitter

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Full Up on Fiber...

"Enjoy so many nonstarchy vegetables, nuts, seeds, and lean proteins that you're too full for anything else."

—Jonathan Bailor, author of "The Science of Slim"

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Skip the Salt an...

"Cut sodium and carbonation! Carbonation can bloat your stomach, making it appear distended for hours or even days! Sodium holds onto fluid."

—Erin Palinski, RD

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Use the Apple Te...

"If you're not hungry enough to eat an apple, you're not hungry."

—Michael Pollan, author of "Food Rules"

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Have a Carb-Free...

"No carbs after lunch is one of the hardest (rules) to follow. But if you follow this rule YOU WILL lose weight."

—Bob Harper, trainer, via Twitter

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Do the Math

"Add a zero to your weight and use that to figure how many calories you should have if you're moderately active. If you weigh 140pounds, aim to eat 1,400 calories."

—Jackie Newgent, RD, author of "1,000 Low-Calorie Recipes"

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