Well expand on what the site was about before. If it was a blog on weight loss then add more articles on weight loss and monetize with relevant affiliate products or whatever. If it was a classified site, promote it and make as much people use it as possible.
Once you do all that, you can find local businesses that are related to those sites and offer them to place their banners on your site for a monthly payment.
You could also use all those sites to rank other sites in similar niche locally (again, expand on what the domain is already about)...