to Amit
Sounds like you're talking about being on call. Surgery has the most call schedules, anywhere from Q2 to Q4 (every other night to once every 4th night). You definitely have to sleep over night in the hospital. The worst is when you are at the hospital 530am on Monday morning and stay overnight Monday night and then you spend all of Tuesday in the hospital and don't go home until Tuesday night....that's very normal and in total violation of NY's laws, but nobody questions this practice. I thought it was ridiculous for students to do it, but on the first night of my call in surgery, I got a terrific case which eventually led to a publication with the chief. Calls are pretty easy after you realize that they're not killers and that you'll actually get to sleep during your call nights. I even had to stay in the hospital on Thanksgiving! At least the intern and I had a turkey sandwich while watching the Macy Day's Parade and Honey I Shrunk The Kids.
For surgery rotations, definitely get Surgical Recall. Not only were pimp questions straight out of that book, but the oral exam and written exams were too. Instead of Lawrence (I hated that book, sorry SpunkyDoc), I had the baby Sabiston (although Baby Schwarz works too). I actually have the big Sabiston too, but I'm really into surgery, so that was $250 well spent. Definitely carry snacks with you....I was a walking vending machine (chips are too oily, try carry those pre-packaged sponge cakes, they're a quick carb and they taste better than Powerbars). And be sure to share your junk food with collegues, residents and attendings.
For medicine, the pocket book to carry seems to be the Washington Manual while most people have Current Diagnosis at home for a reference. A few gung ho IM-intensive friends (who are starting their IM residency this week!!!!) had the full blown Harrisons at home IN ADDITION to the Current Diagnosis.
In Peds, the NMS board review book is pretty good.
On the floors, have a copy of Pocket Pharmacopoeia, Maxwell and the Surgical Intern Pocket Survival Guide (this has blank admission forms, preop/postop forms, ICU notes and tons of things that'll make life easier.). These three are tiny little books you usually see for sale at med school book store cash register counters. They are almost essential. I had Sanford's Antimicrobial guide, but I never used it. The Pocket Pharm was good enough. I also bought the Pocket Book of Eponyms and Subtle Signs of Disease. It's an interesting read....pretty cheap and small.
If you want a letter that carries any weight, get about two from directors that KNOW YOU WELL. Letters from residents probably won't carry much weight. In some rotations, you'll get a chance to really know some attendings and directors really well, so ask them for a letter. In all, you probably won't need more than about 3-4 letters, but definitely try to get them from the big shots.
In regards to journals, all hospitals have a library with some good journals. It's about $250-300/year for 12 issues of your average medical journal, so it might be too expensive for most folks. Having said that, I'm seriously thinking about subscribing to a journal myself, just to collect interesting articles and read them leisurely at home (I might get an attending to sponsor me for a "guest membership" in the medical professional society so that I can get a discounted $115/year subscription rate). During some conferences, well prepared residents will photocopy interesting articles for audience members. Also, hospitals have journal clubs open to students (and required of residents, so if you're attached at the hip to a resident, they'll drag you into the journal club meeting).
I don't know about anybody else, but I absolutely LOVED my rotations and despite the scut work, the 15-18 hr days (36 hr when on call) and the lousy greasy food, being in the hospital was the best thing that happened to this business major-changed-to-MCB major!
Just relax and enjoy your clinical experience! It's going to be a blast!