Have you considered taking a review course? I hate First Aid and when I tutored a student for his retake of Step One, I advised him against First Aid (he used that before failing Step One). First Aid is probably useful the night or two before the exam, but if you depend strongly on it, then you're in for a crazy ride.
I have heard "stories" of people who did passed Step One with just First Aid. Of course, they were probably pretty strong before First Aid, so consider your own abilities and study accordingly.
I started studying my old notes and skimming through text books around Feb (back in 98, when the text was two days long) while taking my Pharm/pathophys/nutrition courses. I started the Arc Venture 4 week intense prep course in May and it finished up the weekend before the exam. I think the course cost me $800, but it was worth it. I was pretty strong going into the course, but I felt much stronger after it. I skipped Histo, Anat, Ethics, Jurisprudence, Stats, Neuro, and embryo during my own studying and Arc Venture helped me pick off the important stuff. I was very strong in path and pharm since I just came off pathophys and pharm. Their immuno and micro (my weakest subject) was really helpful since they summarized all the important points and skipped all the non-relevant junk. I scored in the 90+ percentile and I truly believe that if it were not for Arc Venture, that I would have been in the 80-something percentile.
If you can afford it, and if they have an open course scheduled, I'd highly recommend this course. It's pretty good.
If you can't take a review course, then I'd suggest skimming over your old notes and saving First Aid for the week before the exam. Don't sit for hours in front of First Aid right now, skim through it instead. Concentrate on your old notes and text books.
My student is taking the May 13th Step One. I'm expecting him to break 200 (fingers crossed).
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