Well, I make jam. I use fruit that I grow myself (or my parents). I don't add sugar (only when it's too sour).

It's a good way to have fruit (jam) when most of the fruit is out of season. Yes, you can have strawberry's and such all year round but they come from the other side of the world... and that's not healthy, not for me nor for the environment.
To me in wintertime it's a good and cheap alternative. In the summer I even eat a fruit sandwich.