The National Weight Loss Registry has collected information from over 10,000 people who have successfully lost weight and kept it off for one or more years. In summary the key strategies that successful weight loss maintainers have use include:
- Eat breakfast everyday
- Exercise regularly & decrease sitting time
- Self-monitor behaviours (i.e, weight, diet, exercise)
- Watch portions
- Eat a nutrient-rich, lower kilojoule diet with lots of fruit and vegetables
- Surround yourself with like-minded people
For some other tips for long term weight loss check this out: https://theconversation.com/you-dont-have-to-be-the-biggest-loser-to-achieve-weight-loss-success-11587.