You have to keep them close to your body. Best is to have multiple socks/gloves so you can dry them during the day, in an inside pocket of your jacket, when you're really generating some heat. My experience last winter was that the clothes I was wearing that were slightly damp when I went to sleep were dry in the morning (200wt merino wool), while the liner gloves (powerstretch 50 wt) that I tried to dry in stuff sack kept loose in the bag with me were still wet.
Edit, noting. One thing I didn't take into account last winter was how much sweat can wet out your gloves. What I'm learning this winter is that I can wearing very thin gloves(Powestretch 50 weight) into the teens as long as I'm active(snowshoeing, hiking, digging a snow cave) and my hands are nice and warm. Thinner gloves mean less sweat, and less wet gloves. For low activity periods, I have a pair of mitts or heavier gloves. For something wet like snow cave digging, or travelling in the snow, consider a SUL, wp/b overmitt like the MLD Event rain mitts.
I really like grocery bag vapor barriers for my feet in the winter. Thin pair of merino or poly liner socks, grocery bag, and properly heavy socks for whatever temps you are expecting. The liner's are soaked, but they're thin, so they dry, and both poly and merino retain warmth when wet anyways. More importantly, your heavier socks and boots stay dry inside, so you don't have to put on frozen footwear in the morning.