For Thanksgiving when I host I always make stuff the day before.
Two days before:
- cranberry sauce
- pickled veggies (we're southern and do some weird things like spiced peaches)
- pie crusts (can be done even earlier)
- I also lay out my serving dishes and label each with what's going in it (just a clean post-it in side)
The morning before:
- desserts
The afternoon/evening before I can prepare the following for the fridge and bake the next day:
- green bean casserole
- candied sweet potatoes
- mac and cheese
- if you're roasting veggies you can cut and put in the fridge as long as they're non-browning (carrots, b sprouts, squashes, cauliflower, etc...)
Day of the turkey starts early, obviously.
Mashed potatoes, fresh veggies, stuffing, and assembly things (cheese plate, etc...) are not hard to do.
I cook a lot and my mom and I agree that Thanksgiving requires organization, but it's not particularly hard.