There are countless ways to promote the Thanksgiving Offering in your local church.
1.) Draw, or print, a turkey a turkey with many feathers and place it somewhere in the church. A few weeks before the Thanksgiving Offering, pass out a plastic turkey feather to everyone in the congregation. Ask them to take the feather home as a reminder to pray about Thanksgiving Offering and to ask God what He would have them to give. When they feel they know what God is asking them to give to the offering they are to bring the feather back and tape/glue it to the turkey. As the turkey feathers spread, it is representative of how the offering is used to spread the Word of God to all nations.
2.) A lot of money is spent Thanksgiving week. There's all the money spent on the feast, but there is also Black Friday, Small Business Saturday, and Cyber Money. Why not include a Sacrificial Sunday? What are we willing to sacrificially give to God in the Thanksgiving offering in order to spread the gospel to every nation?