Find out what makes you happy and run with it.
I've found that multiple hobbies can be entertaining -- when one gets old, you can go to the next one (or if one is out-of-season due to weather, etc). You can always go back to the old one again, or if it sucked, now you know
It may sound corny, but if you can incorporate a hobby into volunteer work for the community, that can feel pretty good too. If you like driving, deliver for meals-on-wheels, for example.
Think about what made you happy as a kid and go from there...
RH77