1. Follow a checklist for the room setup at your institution. No one has time to teach you anything advanced if you're perpetually missing basic equipment necessary to do the case.
2. Read about indications and contraindications for arterial, central lines, and pulmonary artery catheters. Watch some videos on proper technique. If you're at a swan heavy shop, learn some basic hemodynamics about MAP, CO, CI, SVR, SVO2, and the normal filling pressures for the right and left heart chambers.
4. Read the Morgan and Mikhail or baby Miller cardiac anesthesia chapters a couple times. Read the uptodate cardiac anesthesia articles. Know the basics of inotropes and vasopressors. Know the basics of how a bypass machine functions and the cannulae positions, including those for cardioplegia. Know the steps of an on and off pump CABG, common valve replacements, and ascending aortic surgery. Memorize one of the various mnemonics for things that must be assured before weaning from bypass.
4. Get to work earlier than you think you need to, especially if your techs are bad/ no techs.
5. If in doubt, ask, ask, ask. There are almost no stupid questions when you're a brand new resident on CV, and the best way to kill a patient there is acting hastily without calling your attending first.