2-3 things. I find when I go crazy and make like 6 things, it makes my life harder and it's too much food anyway. If you've got to have mashed potatoes, make them in advance and reheat in the micro (or in a double boiler) with a little milk to thin. I know they're not exactly the same as fresh, but close! Or if you don't need mashed, make a gratin. Cook it in advance and put in the fridge. Take it out to warm up about an hour before dinner, then pop it in the oven while the turkey is resting. You can make one simple veggie side dish like maybe steamed broccoli (great in the microwave) or a casserole like green bean or something similar that can be cooked and reheated like the gratin. Another option would be sweet potatoes, either a casserole type dish or mashed sweet potatoes, which I think reheat beautifully. You might just skip bread/rolls, but for me it's not a holiday without some! Buy some good quality rolls, or else make them in advance and freeze. (Just thaw that day and pop in the oven for 10 minutes to reheat.) Another option would be a kale salad. I'm making one myself for thanksgiving! You can cut the kale and any add ins and mix up the dressing in advance, then just toss it together before dinner. No need to even do it last minute--it will hold just fine for a couple hours or