Sunset magazine has alot of ideas. I like the simplicity of this leaf placecard.
Another magazine that has a plethora of ideas is Country Living magazine. Since Thanksgiving is all about giving thanks I like this idea of writing quotes of gratitude on thin strips of paper and fastening them to wine or water glasses using double-sided tape. You can invite each of your guests to read their quotes aloud.
For this one, I just loved the rich look of blue hobnail glasses mixed with browns and the added touch of pheasant feathers. Another Country Living magazine idea I found via perfect bound.
Design Sponge for all the arrangement details.