Thanksgivings traditions can be fairly varied, but here's my take:
A turkey is considered to be the standard. There are many ways to prepare it, but a deep fried turkey is a popular thing nowadays around here. Some morons decide to just dump a frozen turkey in to the deep fryer and catch their house on fire. It's a shitty day for the fire department, so I've heard. Potatoes and gravy (made from the drippings of the turkey if available) are standard. Many families do stuffing (seasoned little bread chunks traditionally stuffed in to the turkey), but my family never did. A cranberry sauce is quite traditional, but my family doesn't do that. Green bean casserole is quite popular (not a big fan personally) as well as homemade macaroni and cheese. A pumpkin pie is pretty standard for dessert, though my ex wife did a killer sweet potato pie which I prefer. Sometimes you'll see others like cheesecake or something.
To be honest, I'm not really big on traditional thanksgiving fare.
Every year, my family has a potluck and we all bring a different dish. My brother is hosting. He's somewhat religious, so I imagine grace will be said and thanks given to god and such. This year, I'm making biscuits and sausage gravy (these biscuits are not cookie like like yours, but more like what you would call scones). This is not a traditional thanksgiving dish, but a southern comfort food for sure (my grandparents were from the south). Usually, we just eat, chat, maybe have a few drinks, maybe play a game or two, and usually do the secret santa drawing for presents so we all don't have to spend a ton of money by buying everyone a gift. There are no gifts on thanksgiving. In the past, my mom would have everyone say what they were thankful for.
Some restaurants are open today and serve thanksgiving food, but they're never that good, and I don't recommend them.