Make your church the light people see at night
Several different curricula make apologetics training free and easy
Plan a 5K for a cause or support runners with water and snacks at someone else's
Focus on health from a biblical perspective at a healthy living expo.
Ask church members to distribute business cards for the church around the neighborhood and with unchurched friends and acquaintances
Try a handwritten note, a phone call or a personally delivered pie to thank them for their visit
Keep congregants from filling up back pews first by directing them to the front of the church first
Purchase a rack's worth of papers at a convenience store.
Asking small groups to meet in public spaces increases your church's exposure and makes attending small groups more interesting
Ask your local children's hospital if your church can run a "mobile store" where hospitalized children can "shop" for gifts for family.