Tip one:
Dress Warm...
In all seriousness, make sure you wear a good wicking base layers and then dress in several layers as well. You can't stay out very long if your cold. I also recomend packing in as much as possible so that you dont get overheated and sweaty hiking in to your stand.
Tip two:
Shoot a few practice shots with everything you will be wearing while on the stand. You might find out that your anchor point might not feel the same with a thick bulky face mask on as it did when you shot it during the early season. Your release might feel different as well with thicker gloves on. Drawing your bow might seem different as well when your all suited up.
Tip three:
Stay out as long as you can on morning hunts. Deer will be moving throughout the morning and miday. Getting up to stay warm and search for food.
Tip Four:
Hunt the food sources... Deer will be hitting them hard, trying to take in as much as they can to make it through the winter. Try to pinch them off on their way to and from the them.
Tip Five:
Get out there after a good snow and use it to your advantage. Scouting around a little bit after fresh snowfall can be very beneficial. You may find a new trail that the deer are using that you never would have noticed otherwise. The snow really shows you how they travel and the direction of their travel. Use this to your advantage for your next hunts.
Hope my tips helped a little. I know their are many more and that these are just a few of the basics. I guess the last thing I will say is use extra caution when getting in and out of your stand. Ice and snow make steps/sticks and stands slick and your muscles wont perform like normal after sitting in the cold for hours. Also your you will be wearing heavier bulky boots and you might not have normal feeling in your hands. PLEASE STAY SAFE and be EXTRA CAREFUL druuring your accents and deccents. Don't forget your harness as well. (I put mine on at the truck and then put my jackets on over it). GOOD LUCK TO ALL!