Two items not mentioned above are liner socks and toe warmers. Some years ago, my backpacking and hiking enthusiast sister-in-law told me about liner socks, generally light wicking socks worn under a heavier insulating sock. The idea is they wick away sweat and also prevent blisters. Having tried them, I agree.
Good point. I bought Smartwool liner socks last year and used them all hunting season. I bought 2 more pairs at Christmas - they work great at keeping the feet dry.