Here are a couple of resources that I enjoy for remembering the history of Thanksgiving. The first is Squanto, a Radio Theatre presentation of Focus on the Family. It is an audio drama recounting the travel of the Mayflower and those they met in the New World. This is one of those things I listen to every Thanksgiving.
The second is a new one for me this year. I read about The Thanksgiving Ceremony in the November Country Living and found a copy on Amazon for $1.50. It includes a history of the Mayflower and a complete passenger list of those who were on it. Many quotes, prayers and songs relating to Thanksgiving, and a ceremony that is to be read by all of your guests. We'll be doing this at our table this year.
This darling little book, Count Your Blessings, was a gift from my parents to Emily for her birthday. It is so wonderful! It has little lift-the-flap sections on each page and counts to ten by counting things to be thankful for!