Contractor trash bags aren't just for cleaning up after yourself.
Level of difficulty (1 being easiest, 10 being hardest): 2
Staying dry is key, especially in low temperatures. Poke a hole in a trash bag and you'll have a rain jacket. You can put your pack in a bag and keep all of your valuables dry. You can even use your dental floss in conjunction with your trash bag to create a makeshift shelter to protect against the elements.