Письмо на английском плохие и хорошие привычки для того, чтобы быть здоровым (не из интернета)

Ну можно так:

There are useful and harmful habits. Some bad habits - smoking, eating junk food and late-night dining, watch too much TV and not go to bed at the usual time. You may notice that you have a need to snack between meals or after dinner dessert for no particular reason. Want it just because you have done this for years, and now this - your habit. Or you might not like to eat vegetables, but you really just do not have the habit of eating vegetables and may take some time to learn to love them.

If you are serious about living a healthy lifestyle, you should examine their beneficial and harmful habits. Do these habits are bad for you? if so, you should gradually replace them with good habits. Simply because if you do something for years does not mean that you can not change it. No matter how deeply rooted your habits, you can change this position for a short period of time.