Medicine in specific:
1. Master the presentation. Good subjective, nice flow into vitals, exam, I/Os, labs, and then have a solid 1-2 sentence summary before you present a plan. Keep it professional - no vocal fry, minimal fillers, no uptalk (unless you are actually asking a question). Look confident, not cocky. Practice at home, recorded, if you have to. A good presentation is key; it makes one look more knowledgeable than one actually may be. Don't just read off your sheet. Actually try to develop a plan by yourself - great for learning. Medicine is really great for this and here the attendings really care about it; you can always trim it down on surgery.
2. Agree with the above - keep a book on you. The Pocket Medicine is super handy (for IM, FM, EM, and GS even...). I personally love the Washington Subspecialty Consult in Nephrology - great explanations for acid base and electrolyte disturbances.
3. Really work on your fluid/electrolyte management and the reasons why. Important for medicine and surgery.
4. Read as many EKGs as you can.
5. Review medication indications, mechanisms of action, and effects. You'll see them over and over again and they're more memorable in a clinical context, when working with your patient; medicine is great for this. High-yield (not for Boards, but personal use) meds are for cardiac and renal disease, pain meds, and antibiotics.
6. The basic things that M3s should know are reflected in the shelf: basic differentials, workups, treatment for cardiac, renal, hepatic, GI, infectious, pulmonary disease, etc. Yeah, pretty much everything 🙂
Rotations in general:
1. Keep an open mind in terms of what you like/don't like in specialties.
2. Develop a data-gathering system. Personally, I saw the patients first. Then chart-reviewed: vitals, I/Os, labs, med admin record, orders. Then wrote my note.
3. Develop a tracking system. I like blank sheets of paper that I can quarter up and follow a single patient for 16 days. Some people like fancy sheets with lines drawn for all the labs. Note cards for some. Rounding reports for others. Find what works. Also great on medicine because there is more to keep track of.
4. Find the people who are great at teaching - and let them teach. Ask them questions. Ask why. Know when and whom to question and when and whom not to question.