The first and most important issue is to make sure your feet are DRY. More specifically, make sure your INSULATION stays dry. If you have sweaty feet it will be a real challange. I have used antipersperant on my feet with marginal success but a buddy does one better. He puts plastic bread bags on his feet BEFORE any socks therefore guaranteeing that his insulation will stay dry. He swears by it and always does this if there is any chance his feet will sweat in cold weather.
Secondly, if you don't want to use the plastic bags..........never, never use cotton socks in cold weather. A light wicking polypro under sock and a good quality wool sock over it.
Third, boots with as much insulation as you can handle and still hunt.