Okay, you know to bring your supplies, just like for your LPN clinicals, stethoscope, calculator (can just keep this in your bag), ALWAYS CARRY SCISSORS (you'll be surprised how often your preceptor will need to borrow them and they're always impressed you have 'em - you know that old saying "a good nurse always has her scissors"
), ETOH preps, tape, an extra IV red cap lock usually comes in handy too, a pocket-sized spiral memo book to keep your notes in.
Alright, for the books. Essential: standard drug book, lab book
(this helps me SOOOO much) and a med-surg clinical companion (this is really helpful b/c it addresses common diseases & their tx. (addresses all disciplines typically used medical, nursing, physical tx., etc. w/rationales). I keep in a bag my nursing dx. book - which i have never used during clinical & an IV drug book which i have never had the occasion to use either.