Lost 20 pounds went from a 10 to a size 6/7 .now for keeping the weight off, do you have any tips?

Congratulations !: Eat healthfully. Try to eat at least 5 servings of vegetables & 4 of fruit per day. Increase nutritional fiber. Avoid refined sugar & junk carbohydrates. Avoid alcohol, sweetened juices, soda & caffeinated beverages. Aim for 7.5 to 8 hrs of sleep / night. Hydrate w at least 64 oz of water / day. Be physically active with both cardio & weight training.

Keep doing: Keep doing what you have been doing. You may be able to scale it back a bit to something that is tolerable for long term maintenance. Congrats1