avoiding blood family (everyone gets so worked up about it, but cutting my parents out of my life is one of the best things I did, and I regret reconnecting with one of my parents ten years later - people should feel more free to not talk to your family if they treat you poorly)

embracing chosen family and spending time with people who are kind and loving (organizing a friendsgiving, going to parties, hanging out, etc.)

when I was younger holidays were a significant trigger for me, so sometimes I would just walk alone and get lost in the woods or wander aimlessly in the city, anything to feel safe and like I was escaping "home" where the holiday trauma resided. It gave me a sense of bodily autonomy and safety, I guess.

I still don't celebrate Christmas, and avoiding triggers is still a major coping strategy. Sometimes I try to create my own traditions or reclaim things - like burning a pine-scented candle in December, or getting a small potted tree, or making a nice meal. Focused mostly on rewards that don't trigger me too badly or put me back in bad places mentally.

I suspect most of us will have used drugs (particularly alcohol) to help cope; I don't particularly love or recommend it, but then when you need that level of coping it's usually hard not to use that tool. I bet ketamine therapy would be helpful to a lot of us during these times. If in a psychologically safe enough context, I think low doses of psychedelics can be helpful as well.

During the hardest times, I would sprint until I was in pain, and then kept running - that became a coping strategy, running is drugs even if also unpleasant.

The reduced sunlight can also be a problem in the winter and using a therapeutic SAD lamp can be helpful (I especially found it helpful pre-transition, it even had a doping effect for me).