I think it's a nice chance to focus on the some of the nicer, simple things about winter.
Go foraging for sloes and blackberries, and steep them in gin/whiskey for the depths of winter.
Make your own christmas cane and pudding.
If you have an outdoor space, plant some winter interest plants and make a hedgehog shelter, and put up bird feeders so that it is a winter nature haven. And get a firepit and have winter campfires.
Get a lovely season perfume - I like smelling faintly if church Incense when it's cold.
Heated throws are the cosiest things ever.
Find an indoor activity that everyone in your household enjoys. DH is a bit of a geek and persuaded us all to play Dungeons and Dragons during lockdown, and I didn't expect to, but I love it, and the game is the highlight of our week in many ways.
Get really good warm/waterproof einter clothes for everyone so that you can enjoy the outdoors in bad weather.
Think about the lighting in your house - if you will be spending dark days inside, would you like more/different lamps, candles, fairy lights, mirrors to reflect light etc anywhere?
Also nice smells.
A good slow cooker or instant pot is lovely for winter stews.
I'm saving up for a rowing machine for cardio without leaving the house.