Gloves:
Keep your hands covered at all times. Waterproof gloves and
mittens lined with synthetics such as Thinsulate insulation are effective insulators. Mittens keep hands warmer than gloves.

Socks and Boots:
Generally, two pairs of socks are the best bet: a thin liner sock of something wickable like polypropylene and a thicker outer sock of wool. It's essential that the sock system not overcrowd the boot, making it too constricted for good circulation. Start with warm feet and footwear. Keep your socks and boots inside your car (not the trunk) on the way to your destination. If your feet sweat, put on fresh, dry socks just before going out, or anytime after a period of activity prior to  resting. Keep your feet dry. Consider purchasing waterproof boots and using foot powder or anti-perspirant on your feet as well as waterproof, breathable socks or boot liners

General Outdoor Safety:
Always  wear "hunter blaze orange" while in the woods during hunting season.  Even if you are not hunting!  Never wear clothing in the woods that might allow you to appear or look like a game animal. Be prepared for the worst possible weather conditions. Bring along heavy clothing in case you are caught in more severe weather than expected. Any exposed skin is a candidate for hypothermia or frostbite. Dryness and warmth are the most important factors in preventing cold weather injuries.. Cold temperatures plus wet clothing are a recipe for illness.

Staying comfortable in severe conditions:
Keep your body warm and your metabolism high. Your body core and your head must be kept warm to allow for circulation to other body parts. If either your body core or your head are too cold, your body will shut down the heating of extremities in order to keep the core and head warm. 

Nutrition:
Eating calorie-rich foods and drinking lots of liquids will keep your body energized ;however, the chemicals in caffeine and nicotine will have the opposite effect.

Dress in layers:
First, a breathable layer next, an insulating layer (trapped air makes an excellent insulator) on top, a protective layer.

Underwear:
The breathing layer is usually the layer of clothing that comes in contact with skin. Ideally, the breathing layer allows body moisture to escape and evaporate more quickly, thereby keeping the skin dry. Use polypropylene long underwear to wick moisture away from the skin. Avoid natural fibers such as cotton, because they tend to hold the moisture close to the skin, making you colder. (The same holds true for hats, gloves, mittens and socks.)

Outerwear:
The insulating layer creates dead-air space between the layers of clothing, thereby trapping warm body air and keeping it around the body. The protective layer (outer shell) protects against environmental assaults of cold and wetness. Look for outerwear that is warm, water-resistant and well-insulated with a synthetic fiber. Thinsulate insulation absorbs less than 1%  water, so even if your clothing gets wet while you're outdoors, you'll still remain warm.

Jackets:
Outer shell. Machine-washable jackets retain their waterproofing better than those that require dry cleaning. Jackets with outer shells made of tightly woven nylon or polyester are less susceptible to tears than those that are all cotton or made of microfibers. Even if a material is waterproof, water can still get in through seams that are not
sealed, so look for jackets with sealed seams.

Zippers:
Double (or triple) rows of stitching on either side of the zipper offer better protection to keep the snow out. Oversized zipper tabs are easier to use when wearing gloves
or mittens.

Insulation:
Clothing insulation works by trapping air between fibers. The more air trapped, the more efficient the insulation and the warmer your body stays.  Look for Thinsulate™ Insulation in better outdoor clothing.  These clothes provide the freedom of movement and warmth that active sports enthusiasts need. Hunting jackets, hats, gloves, boots and pants - all available with Thinsulate insulation. And because it absorbs less than 1% of its weight in water, Thinsulate insulation keeps you warm even in damp conditions and dries easily.