There are many ways for self-disciplined people to lose weight, but the most important thing is to stay healthy. Here are some suggestions that may be useful:

1. Diet control: reduce the intake of high-calorie and high-fat foods, and increase the intake of vegetables, fruits, whole grains and protein. Try using an app to track your diet and calorie intake.

2. Increase the amount of exercise: do at least 150 minutes of aerobic exercise every week, such as brisk walking, running and swimming. In addition, you can also carry out strength training to help increase muscle mass and improve metabolic rate.

3. get enough sleep: lack of sleep will affect metabolism and appetite regulation, so you should ensure that you sleep for 7-8 hours every night.

4. Drink enough water: Drinking enough water can help the body detoxify and maintain the metabolic rate.

5. Reduce stress: Stress can lead to weight gain, so you should try to reduce stress, for example, through meditation, yoga or other relaxation techniques.