Honestly - have a hobby.
This is a great way to spend time doing something you love that doesn't cost a ton. I do suggest you select a hobby that isn't crazy expensive - so maybe don't have 'race sailboats' as your hobby.
Some great ideas for hobbies that are affordable and fun!
- Take photos
- Knit
- Sew
- Create a podcast
- Blog
- Play a musical instrument
- Learn a language
- Hike
- Book Club
- Bike
- Walk
I also recommend joining a group if like minded folks who share your hobby - so I meet with a knitting group weekly. I love talking yarn, projects, knitting and laughing each week! I have friends that meet in a local coffee shop to practice French. Another loves to hike and has a very complete hiking blog - check it out: http://bahiker.com/.