My phone is a Kyocera smartphone. It is run by a Palm pilot, and I'd be totally lost without it. I use it for school as well as work. Keep my schedule on it, etc.
When in my hospital, I turn the phone part off. The palm is where I keep the Davis' Drug Guide for Nurses, and Epocrates (a free program that keeps track of drugs, like a low-end version of Davis' drug guide, but it has the advantage of being continually updated (which loads the updates to the palm everytime you sync to the desktop).
Davis's Drug Guide for Nurses appears to contain all the text info that the book itself has. Looking up the drugs is a breeze, and it beats carrying my book around (and risking it walking off). Before giving drugs, we have to tell our preceptor or the nurse we are shadowing, about the drug, precautions if any, and possible reactions (most likely). This format makes looking 'em up a breeze.
I also have just acquired an RN Careplan program. I looks a little dated, but does seem to collect and collate all the needed info. Looking forward to giving it a whirl
My palmpilot is like a companion. I don't leave home without it!