resources should be remembering physio and pharm and read parts of baby miller or usually they'll provide a packet for you to read.
as for the rotation it should be pretty chill, get there in the am, help residents set up their OR, go talk to the patient in holding, evaluate their airway, if they let you fill some forms out do it, once in the OR be proactive, help the patient to the table,move the stretcher out of the room, place the bp cuff, pulse ox, ekg leads on the pt, help draw up meds if they let you, pay attention to what the attending/residents are doing, watch the monitors, ask questions, ask to do procedures like starting IV's, intubating, maybe A-lines. You'll get the swing of things in the first couple of days, just be proactive and try to keep things moving, try not to wait for people to tell you what to do and just do them yourself (this is tough at first).. also relax and know that a lot of times attendings/residents just want to shoot the sht and tell the people that you're working with that you want to go into anesthesia.
and most importantly have fun!