Oh, I so understand.
I worked my butt off cooking and getting ready for Christmas....and then it's over. Next year I'm skipping it all. We're going to get into the truck and drive to the beach.
That said, I still had to deal with the post holiday slump this year. What did I do? I gave the kids chores to do around the house, and then I went up to their rooms and did a major purge. I rearranged their furniture, threw out all the broken stuff and trash, put all the outgrown clothes into the donate pile, deep cleaned it all. Their rooms look amazing, and it made them both so happy. They're not messy kids, but you know how their stuff can pile up when they save every rock and sparkly thing. They love their "new" rooms and I love how I feel when things are clean and organized.
The next day I did our office. I filed all the papers that needed filing, put the stuff to toss out in a burn pile, straightened, organized and cleaned.
So that's three rooms that are now organized in our home.
The Christmas tree/ornaments aren't a big deal. I'm still enjoying them, for goodness' sake. They'll be up for another week or so.
The kids can fend for themselves for a meal, unload the dishwasher, and walk the dog.
The bed doesn't have to be made today. You're going to mess it up anyhow.
Grab a cup of coffee and go tackle that one room that you keep shutting to door on. I guarantee you'll feel better. :-)
ETA: I should have mentioned....we totally vegged out on the 26th. Didn't even get out of our PJ's. We all need a veggie day sometimes. Maybe today is yours!