In terms of exercise, the I would strongly argue that the best advice is to test and explore new hobbies until something is enjoyable enough that they want to continue with it just for the fun of it. Going to the gym if you have every minute of it is not going to improve your health, but doing something physically that one enjoy brings many benefits.

A big upside about hobbies, especially if one focus a lot on it, is that one is likely to meet others who is enthusiastic in the same thing.