I plan trips for Jan and Feb to a cheap warm place, best time to go Spain Italy or Portugal, not as many tourists and enjoyable weather. Now that I have kids, I take them for walks in the afternoon and the sun and movement has really helped. During my college years when I was working part time and didn't see the sun all day as I am in a windowless classroom and office, it was brutal.

Now I take 6000umg of vitamin d as well. I will probably do winter in Thailand or Malaysia during retirement