A "one-brain page" is a sheet of paper, usually withan outline for jotting things down while taking care of your patient, i.e. lab values, proceedures, I&O's, medications, medical Hx, etc. I've made one for work on my computer. I also took a Highlighter with me to mark things so I wouldn't forget them. Along with a red pen to write down NEW information as it comes during the day.
Oh, and like Furball said, Don't forget your sense of humor...even if it is a silly little joke like: "What is the one thing in the world that only elephants have? Answer: Baby elephants." That was my instructor's favorite one!
I'll see if I can PM you my brain