Those are good choices, since they're not dependent on other info to start studying. As for labs, some of the big ones are WBC, platelets, hemoglobin & hematocrit, BUN, creatinine, PT, PTT, serum electrolytes, albumin, and arterial blood gas values (pH, PaCO2, HCO3). Those are the ones I can think of off the top of my head that keep reappearing.
For med term, try to look at roots, prefixes, and suffixes - if you understand those, you can usually figure out a word you've never heard before. You may want to try a book with quizzes, instead of buying the pre-made notecards.
Also, it doesn't hurt to look at some basic med math calcs before you start.
Good luck! July will be here before you know it!