An added trick I learned a while back, when it is really cold, zip your shell or jacket closed and slide your sleeping bag into it from the bottom end. The added layer covers your feet and up your legs, really helps. Also, be careful buying a bag too long, the added space may seem comfy, but it traps cold air.
There's 2 dates they carve on your tombstone. Everyone knows what they mean. What's more important is time that is known as the little dash inbetween.
