I think scoring 77% on the pretest series is good for step II purposes because if you are doing the specialty pretest books, step II is actually more general then those books. I'd also recc purchasing q bank, spending 150 for those 900 questions helps motivate you to study for one month. I ended up post-poning my step II because I was so unmotivated to study for my original date; I think that it's useful if you are doing an easy rotation at the same time that you are trying to study, because sometimes it's difficult to start/wake up during the day if you have nothing official on your schedule. I had a whole month off when I was supposed to be studying for step II, but I ended up not doing anything besides watching tv and playing on my computer when I should have been studying. It just felt too much like vacation time to study. Good luck! You are doing the right thing by taking it early in the year by the way, to improve your app with a strong step II score.