Here is my list of good things to do on a date. I've done all of them many times myself and can recommend them for a good time. I've tried to include a variety here. Feel free to add onto it. These are most likely slanted towards my own interests.
- Go hiking
- Make sandwiches and go have a picnic
- Prepare a dinner at home, then eat while watching a movie
- Visit a nearby zoo
- Take dance lessons
- Pick out a tree at a nursery and then plant it
- Build something, goto a crafts store and see what inspires you