buy yourself hand-warmers, poly propalyne socks, and silcon based moisturizer. the hand-warmers obvious (cold hands suck), poly propalyne socks are hydrophobic, they will dry super fast if left as barrier under wool sock (say goodbye to foot sweat). the silicon based moisturizer is to keep your face moisterized, if it drys out, it is more likely to get frostbitten. do your shaving at night (drys out your face) when you are on stove watch, it is also a great time to get your kit squared away. take care of your feet, get foot powder, use a rag and clean them, again best time stove watch. if ever you are given a break, take care of your feet then go to sleep, but always feet first. to be honest there is not much that people can tell you how to survive in the winter other than the obvious to keep warm and dry, you will have to learn most of it on your own.
by the way, you will love your ranger blanket, it is a great piece of kit. also pack your valice in logical order of taking it out (so your kit doesnt get wet). line your valice with garbage bags, it is not water-proof. also keep a pair of wool socks in your but pack with powder. put all your stuff in large ziplock bags so it wont get wet, also when you are rooting around you can save time by pulling out bags of related items (ie- socks/stuff for your feet) for your clothes, roll them up and get elastic bands and wrap them around them. it is no fun when you pull out something and a peice of rolled up clothing pops out and un rolls and you have to waste time to roll it back up.(put clothes in ziplock bags too). well i cant think of anything else, but you will learn.