I wanted to clear one thing up. Since the night I thought would never end, most of my call nights have been relatively painless. I don't want my entire readership to think that every call = no sleep and lots of work. I've had several where I got to sleep for more than 3-4 hours. :) It is best, I think, just to expect the worse so that when it happens you are not too disappointed. Last night, for instance, I was SO close to getting to lay down, but then got paged because one of our patients got very sick and had to be intubated.
One thing I am learning from the nights when I don't get to sleep: I can ALMOST fall asleep standing up if I'm still enough. This I discovered while scrubbed in to watch my upper level resident put a central line (large IV that goes into a vein that is close to the heart) into a sick patient.
I've also decided that between 4am and 6 am is the absolute WORST time for me to be awake. I do NOT do my best learning at that time. I've noticed I actually start to feel sick to my stomach. It makes me wonder if everyone feels that way, or if I'm just weak.