I know you're eager to dig right in -- and you should. Be cautious about focusing exclusively on the technical side of things. People who become your patients are more than a collection of molecules and body systems. They're people. Real people with fears, hopes, dreams and loved ones. You will respond to their calls for help when they are desperate and need you most.
Your most critical skill is a good bedside manner. One thing they won't teach you or test you on is this:
Don't ever be afraid to hold your patient's hand all the way to the hospital if that's all they need. A single, simple display of compassion may be the most meaningful thing you can ever do for someone.