Make changes to your lifestyle that you can stick to, and you will find maintaining a healthy weight easier. Fad diets tend to make your weight drop dramatically and then rise again, so avoid these. Instead, try to eat more whole fruits, vegetables, wholegrains and lean protein while increasing your activity level. Walk more, join a local sports team, or swim regularly. The occasional sugary treat is fine, but make sure it's occasional and part of a balanced diet.