My daughter and I dropped over 35 pounds about 3 years ago. This is how we maintain our weight:
#1- Staying away from fast food places and being very choosy at the rare restaurant meal. We eat mostly at home and carry a lunch to work.
#2- Lots of apples, bananas, oranges, broccoli, kale, spinach, cucumbers, bell peppers, romaine, mushrooms, onions, garlic and other vegetables make up my daily diet. Occasionally I throw in a chicken breast or a salmon steak but not every day.
#3- I don't use processed sugar, having long been a fan of Stevia for sweetness and keeping my sweet tooth satisfied.
#4- For snacking I love peanuts, walnuts, soy nuts and dried cranberries in a mix with a sprinkling of dark chocolate M&M's.
#5- I drink water almost exclusively.
#6- I cook with olive oil and use it in salad dressing.
#7- I have a very active job, and my daughter goes to the gym at least 3 days a week.
Your lifestyle should support your effort and make weight control easy, so it may mean some changes- but it's worth it!