Reformed Worship has many ideas to help you plan your Thanksgiving worship service. Simply go to reformedworship.org and search for Thanksgiving.
Here are some good resources to get you started:
- Two Thanksgiving Litanies with Responses from the Psalms
- Prayers for Thanksgiving Day
- Let All Things Now Living: A Thanksgiving Service with scripture, songs, poetry and slides
- Thank you, God, for granite, gravity, and grapes...Thanksgiving Prayers
- Prayer of Thanksgiving with the 10 Commandments
- So Many Leaves: A Thanksgiving Service