A great way to enjoy your hobby without having to spend any money is to get active with your local woodworking group. You can easily find one using the Internet by using Google or another search engine with your local city and "woodworking association". Alternately, you can try using other social networking sites like Meetup.com to find like-minded enthusiasts in your region.
In my neck of the woods, the Ottawa Woodworking Association hosts numerous activities throughout the year and promotes woodworking in the community and helps its members to improve their skills by hosting numerous challenges, meetings, and other events.
Most of these groups allow a few free visits before asking you to join, so get involved in a local community's woodworking group! There is no excuse to be away from woodworking, even if your workshop is closed for the winter!