I'm going through a downsizing phase. My attitude is: Less is more. So I'm learning to how to do things that don't cost money. In the process I'm learning how to appreciate things that I've always taken for granted.
Bicycling is great during the spring and summer. I've got an old Giant OCR3 21-speed that I take on the bike paths. I cruise around and see things that I would never see driving the streets. I also have an old Specialized Rockhopper I found at a thrift store. I learned basic bicycle repair and so I take that to the hills sometimes.
Almost always there are events going on that are free to the public. Sometimes it's wine or beer tastings (if you're of age), or art galleries always have showings.
You could always volunteer your time for the day for something that interests you. Parks and Rec always need volunteers to help with sports activities. And there's trail building and maintenance for area parks.
When was the last time you read a book? The problem here isn't that there isn't anything to do. It's the person who refuses to take the initiative.