Stopping and implementing a plan will help you to control fear and to avoid panic. Remain calm even if things aren't going quite to plan. Control your thoughts. Think Positive Your situation is only temporary. Build them small, as large shelters require more time and effort.
Emergency shelters are easy to build, but take time and effort.
Do whatever is necessary to keep warm and dry. A tree is the best type of shelter since it is already half built. Select a tree well that is out of the wind and has limbs drooping to the snow. Add more limbs, bark, tarp, garbage bags or slabs of snow for the roof and build up snow for the sides. Insulate the floor with boughs, pack, etc.