1. First thing I do is dress in as many layers as necessary to respond to the temperature.
2. If I have money, I go to a coffee shop and drink either hot coffee or hot tea. I stay until I warm up.  
3. Then I to to the library, catch up on my reading, and stay until it closes.  
4. Then I go to the shelter and spend the night. 
5. In the morning, I start the process all over again.