Canton Public Library all library materials check out free to those who live, work, go to school, or own property in Canton (folks who don't fit into those categories can purchase a library card). Wifi and Internet access are free to anyone who walks in the door.
Western Wayne Freecycle Freecycle in Canton, Plymouth, Livonia and Westland, Michigan, helping match people with things to give away to those who have a need and keeping unwanted items out of landfills.
Pretty much every restaurant has an email list for sending out coupons. If you're worried about spam, and you use Gmail, you can add +restaurant_name after your username to get a unique address for that restaurant.