Home sharing is one way to earn extra income–you rent out a room.

Another option is to run a bed and breakfast out of your home, making available a room or two to travelers now and then. This website enables you to list your offering. I looked at rooms available in San Francisco and Corvallis (where a relative lives) and was impressed with the variety and pricing of what is available.

You could gross $200/month by making a room available one night a week for $50/night. And if you’re traveling, this option is less expensive than most other accommodations and probably a lot nicer.