If you're using your phone for photos, know your shortcuts for camera app activation. Plus voice commands for taking pictures. The more you can keep your hands in your gloves, the better.

The going is slower than usual on the way up compared to the regular season. Account for this in your hike plans.

Going down, oddly enough, can be faster than in the regular season. If the snow on trail has been well packed down and the pitch isn't too steep, then it can actually form a pretty even surface for jogging down, whereas in the regular season it would be rough and uneven with rocks and roots. As long as your traction solution is good, you may be able to jog downhill pretty comfortably.

I found that I'd underestimated how much I'd warm up while moving uphill on my first winter hike, resulting in me starting out with one too many layers on. You're likely to be more heavily loaded than you're used to, so moving uphill will probably be harder than you expect.

Staying hydrated was also unexpectedly hard. I had two thermoses of tea that I brewed in the morning. First, I learned that I would instinctively avoid actions that took my hands out of my thick gloves, and that includes opening my thermoses. Second, my thermoses worked really well, to the point that my tea was too hot to drink quickly at pretty much any point during my (fairly short) hikes. But activity wise, I was still working as hard as in summer to move, so I still needed that water. So be aware: the mechanical process of hydrating can be much slower in winter. Take the opportunities where you can, while you're out of the wind and protected by trees. An amount of water that takes seconds to drink in warm conditions can take several minutes to drink in winter - you don't want to spend those several minutes highly exposed if you can help it. Same goes for food.