Every year before the clocks change, I move the furniture. Nothing's wrong with where it was. It's that once I stop noticing a room I stop enjoying it, and moving one thing makes me look at all of it again.
It hits hard. What I've figured out is that getting ready for it beats clawing my way out once it's already here. So I do this in October, while doing anything still feels easy.
If that's you too, here's what I change and the order I change it in. Works the same whether your desk is at home or at work.
Move something first. It's free.
Before you buy anything: turn the desk. Face a different wall, or the window, or away from it. Move the lamp to the other side. Half the time the new setup isn't even better, and that's fine. What you get is a couple of weeks of actually seeing the room again, which has done more for me than most things I've bought.
In an office it's smaller. Clear the whole surface, then put back only what you actually use. Whatever doesn't go back is telling you something.
Then light, because light is the real problem
What changes in winter isn't really the cold. It's that the afternoon ends at four. An overhead light doesn't fix that, it just gives you a bright ceiling. What helps is warm light down at desk height, switched on early — before it goes dark, not after.
Set it out in October. The month you need it most is the month you won't feel like unpacking anything.
Then the warm layer
Two things, neither complicated. A blanket that lives on the chair instead of in the closet — one you have to go and get is one you won't go and get. And a candle. You won't see it in a photo, but you'll feel it in the room.
And one thing that's just silly
I've always had something silly on my desk. Life's too short to be serious all the time, and a desk you've made a bit ridiculous is a desk you don't mind sitting down at. On the bad days that counts for more than whether it looks tasteful.
The order, and why
Move something. Then light. Then warmth. Then something silly. Each step costs a bit more than the one before, so if you stop after the first you've still done the free part.
Do it while it's still light at six. That's the bit I'd push hardest on.