1. Set a goal: First, you need to set a clear goal. This may be to lose weight, gain muscle, maintain the current weight or improve health. Your goals should be specific, measurable, achievable, relevant and time-bound.

2. Healthy Eating: Maintaining healthy eating habits is the key to managing your body. You should eat foods rich in protein, fiber and complex carbohydrates, while reducing the intake of sugar and processed foods.

3. Exercise regularly: Exercise can help you burn excess calories, strengthen muscles and improve your body's metabolic rate. You should do at least 150 minutes of moderate intensity exercise or 75 minutes of high intensity exercise every week.

4. Adequate sleep: Sleep is very important for weight management. Lack of sleep may affect your appetite and make you more likely to overeat. Adults should sleep at least seven to eight hours every night.

5. Manage stress: Stress may lead to overeating and weight gain. You can manage stress through meditation, yoga and deep breathing.

6. Regular physical examination: Regular physical examination can help you track your progress. If you find that you still can't achieve your goal after your efforts, you may need to seek professional help.

7. Perseverance: It takes time and patience to manage your body. You may not see the result immediately, but as long as you persist, you will see the change.