10 Rules Fit People Live By

What you need to do to reach your fitness goals.

— -- intro: Personal trainer Joel Harper has spent two decades helping his clients (from Olympic medalists to Dr. Oz) reach their fitness goals, and over the course of his career he’s discovered the reason why some people thrive and others fail: It’s all about attitude, he argues in his new book, Mind Your Body: 4 Weeks to a Leaner, Healthier Life ($20, amazon.com).

Harper has taken years of experience and distilled it into "10 core concepts for optimal success." Health spoke with Harper about these rules, and how to put them into practice.

quicklist: 1 category: title: Shut out the noise url: text: By “noise,” Harper means the constant stream of negative thoughts that runs through most people’s minds. That mental static is your biggest obstacle, he says; learning to filter it by focusing on positive thinking is essential to your success.

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quicklist: 3 category: title: Cultivate grit url: text: Grit is the resolve and passion required on a daily basis to pursue a long-term goal. To cultivate grit, you have to commit to consistency no matter what. A fit person wakes up every day knowing she will do whatever it takes to stay on track—whether that means getting up an hour earlier to make it to the gym before work or squeezing in a power walk at lunch. The secret is focusing on the thoughts that drive and inspire you. If it helps to remind yourself how good you’ll feel post workout, for example, do that. If it motivates you to daydream about your future toned tummy, do that. Concentrate on exactly what you want to achieve and make every day count.

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quicklist: 5 category: title: Visualize success url: text: Harper has all of his new clients close their eyes and imagine their ideal body—both what it looks like from head to toe, and how it makes them feel. Then he tells them to go shopping: “I say to people, ‘Hey if you want that body, then buy clothes that would fit if you had it. And try them on every day until they fit.’”

quicklist: 6 category: title: Eliminate excessive choices url: text: Chocolate croissant or steel cut oats? Grilled salmon or a quesadilla? When you have to make these types of dietary decisions all day long, you may end up exhausting your willpower. Planning your meals in advance, however—even just one meal per day—can make it easier (and less stressful) to eat healthy.

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quicklist: 8 category: title: Yield to traffic url: text: It’s inevitable that from time to time your healthy routine will get interrupted by forces outside your control, like when your partner proposes an impromptu date night right after you’ve bought salad ingredients. When that happens, try to go with the flow and enjoy yourself.

quicklist: 9 category: title: Believe it and become it url: text: This rule is simple: “If you believe you can be in amazing shape, then you’ll do things on a day-to-day basis to accomplish it,” says Harper. The problem is, many of us carry around defeating beliefs. When you recognize a negative thought (like, “I’m so uncoordinated”), ask yourself why you think that way. You may discover the criticism originally came from your parents, or your sibling, or a childhood buddy. “Don’t give those outdated internal beliefs power,” Harper says. “Just let them float away, like leaves that have fallen into a river.” You have control over your thoughts, he insists; they don’t have control over you.

quicklist: 10 category: title: Jump for joy url: text: Harper’s most successful clients are the ones that celebrate their milestones. If you don’t appreciate your successes along the way, “you risk becoming emotionally numb, nonreactive,” he explains. But giving yourself regular (healthy!) rewards (like a massage, for example), provides a little “added oomph” to keep going and push yourself even harder in the long run.

This article originally appeared on Health.com.