I was old fashioned - we had a computer generated patient list, hopefully only 1 page, and I folded it in half lengthwise. On the back side, which folded over to meet the patient's name, I wrote down labs. On the front in the space between patients, I had their vitals, and a check list of things to do.
While it may have been busy at times with sick patients, lots of vent settings, etc. I had a system, so everything was always written in the same place and I frankly could have patient info a lot faster than most of those with PDAs or cards.
Whatever works for you is the best system.