I'm heading into my fourth winter. Over the past three I've gotten things pretty under control. As it stands now, there's nothing that I *need* to buy. Even my spare parts inventory is full.
All I really have to do is swap the SKS P-35 fenders from the Portland (my four-seasons commuter) to the road bike, and mount the 45mm PlanetBike Cascadias in their place. Then, on the Portland's second wheelset, I have to swap out the CX tires for the Nokians.
But, I want to pick up a second pair of the Endura Thermolite bib tights I liked so much last year. That way I'll have two pairs to rotate. Maybe I'll get a third pair just in case they decide to "improve" them in the future. I *really* like those tights.
I may pick up some more long-sleeve wicking shirts for layering, so it's not a stinky emergency if laundry day is late a day or two.
I had a couple of unexpected expenses this year (new computer, moving) so I won't know for sure for another six weeks, but I'm still hoping to be able to afford a dynamo hub and lights. If not, my DiNottes are still just fine.
But really, worst case, Mom Nature could dump a foot out there tomorrow and I'll be just fine without buying anything.