I'm keeping the heat off in my room this month to save energy, and now it's really hard to get out of my warm bed to get dressed and stuff since it's like 50 degrees in here. What should I do to stay warm (besides turning on the heat)? I have a snug sack, but it's a pain to use in the morning. I have a robe, but it's too thin. What say you? Thicker robe? What kind is warmest?