The physicians I work with always tease me about how paranoid I am...
1). NEVER say the "Q" word (quiet) or the "S" word (slow).
It never fails that the you know what will hit the fan whenever someone says this. Case in point, when I was a nurse extern on a peds floor in nursing school
I used to work nights. One night around 11 pm, we sent home a lot of our staff for the night b/c it was dead. We only had like 3-4 patients. So there were two nurses and me. Around 1 am, Tina (who was my mentor and I LOVED) propt her feet up on the desk at the nurses desk, leaned back in her chair and said, "GOSH it is SO slow tonight!" 8-10 admissions later (I am not kidding) and we had to call back all of the people we sent home in the middle of the night I was ready to kill her.
One of the attendings I work with will always remark on the slowness of a day when she is on call. Never fails, she will have the night from hell. I tease her all the time about NEVER saying it!!!
Another one of my attendings ALWAYS has the black cloud when he is on call. If something horrible, weird, bad is going to happen, it is when he is on call. Last year we had 3 really bad snowstorms. He lives about 45 minutes away from the hospital and has to spend the night in his office on a mattress on the floor (we don't have overnight call rooms) b/c they never plow his driveway. Guess who was on call for all three storms and had to stay at the hospital for days. You got it! It is uncanny what happens to him whenever he is on call. Does not ever happen to the other two attendings I work with.
My dad was the same way. He is an anesthesiologist and used to cover the post open heart ICU years ago. The nurses LOVED him but HATED it when he was on call b/c someone ALWAYS crumped when he was on call. Everytime!
2) Full moon- brings all the crazy people out. Just weird stuff happens. Half the time I don't even realize it is a full moon until later.
3) NEVER say the first and last name of your frequent fliers that drive you nuts. If you speak their whole name out loud, you WILL be hearing from them, usually in a crisis. We always try to use initials...and if someone ever slips and says the whole name, they are responsible for dealing with them when they call/come in etc.