I have been cooking my turkey(and some of the sides) for years now. I've been a nurse for 34 years and I can't even count how many holidays I've been on duty. I started cooking early to accomodate my schedule and it just kinda stuck. I cook the turkey completely today, then after it rests for about 20 min I'll cut it off the bone into white meat and dark meat piles. Once it's cooled a bit I put the packages into the fridge.
WHile the turkey is roasting and thus, tying up the oven, I start cooking my sides. Giblets are simmering. Collards are slow-cooked--the are always better on the second day, after they've soaked up the broth(called "pot likker.") I put together a lovely Waldorf salad(apples, celery, pecans.) I've boiled the carrots for carrot souffle--it gets cooked tomorrow because, well, it's a souffle.

Whole berry cranberry sauce is coolin' and jellin' as we speak. Eggs are boiled.The biggest thing is chopping all the celery and onions, tons of them, and wilting them ahead of time. My bread crumbs were done last week, so I'll put all that together tomorrow in a crock pot.
All I need to do tomorrow is put in a punkin pie, reheat the turkey with some of the pan drippings that I save today, make the gravy(from a jar

), start the crockpot dressing,and make some quick succotash(limas & corn.) DD17 will make her famous carrot souffle, devilled eggs, stuffed celery, and olive tray.
See, my mother used to do all this stuff ON Thanksgiving day. In fact, she still does. Which isn't terrible,but she doesn't want anybody "bothering" her while she cooks. But it's too much for one person to pull off in one day, so she gets angry and pouty. And no appetizers to "ruin our appetite!" She always intends to have it ready by 1pm, but it never really gets done until about 4:30, by which time all th children are crying and whining, the adults are getting bored and next thing you know, someone's mouthing off a little too much. By the time we eat dinner at least one family is unhappy because they are now late for their meal with their in-laws. And mother does this year after year.
Now do you see why I cook mine ahead? I can get up at 9am, watch the parades while I put in my pie and start the dressing. DD is doing her thing and we're all ready to eat before 1:30. Important, too, because AFTER the dinner the kids drag out all the Christmas stuff and put up the tree!