This Sunday falls on the Thanksgiving Weekend and it is also Communion Sunday. How appropriate. Another name for Communion is Eucharist, a transliteration of the Greek word for Thanksgiving. In the Eucharist we are:
Thankful for what Jesus accomplished through His sacrifice
Thankful for what the Holy Spirit accomplishes in us because of His sacrifice
Thankful for what the Father will accomplish in greeting us in Heaven because of His sacrifice
In preparation for Sunday consider reading: Psalm 118 and I Thessalonians 5:18.