Pack a survival kit and keep it in the trunk of your car. Put together survival items including waterproof matches, flares, dried fruit, packaged food and a sleeping bag. Carry a backpack of emergency supplies if you are walking into the bush when the temperature is below zero.
Stay where you are and preserve your energy. Trying to walk can be dangerous in subzero temperatures, particularly at night. Distant lights might seem close, but they are usually much further than anticipated.
Find some dry branches, use them as kindling and build a fire. Slowly add more dried wood to the fire. A fire keeps you warm and helps search parties find you. This is particularly true at night, but smoke can be seen from a long distance during the day. Melt snow in a saucepan for drinking water. Avoid dehydration at all costs.
Light a flare to alert rescuers of your location. When people are looking for you in subzero temperatures -- be it on foot, skidoo or bush place -- flares and fires help them find you.
Use boughs from evergreen trees to construct a lean-to for shelter. Keep out of the wind. The wind-chill factor further lowers the temperature and saps your strength.
Burrow under the snow. The Inuit people use snow to build igloos, and tunneling into the snow might save your life during a sub-zero emergency. Snow serves as insulation -- and protects you from the wind -- if you burrow deep enough. Poke your arm through the bank -- to create an air passage -- after burrowing in.
Cuddle up with a dog. Sharing your sleeping bag with your dog allows both of you to benefit from the body heat. Do the same if you are with a friend. This simple survival technique raises your chances of survival.