5 month plan?
Read the EK books (if you're going along with EK anyways...)... for 2 months, an hour before bed. Just read one book at a time. Let it sink in.
3 Months out... practice exams. practice, practice, practice. If you find an area you're week in... go back to the book and brush up in the subject. I converted the EK books I bought to pdf and popped them on my ipad. I would re-read the books on the transit system in Boston while going to school/work/home/whenever.
...practice problems helped more than anything. I would get stuck on a problem, go back to the book (place a postit to mark that - knowing I have a weak area) and review. I would move forward, and if I crossed that again, I would go right back to where I marked and review again... when I had problems (mostly with physics..) I sought out some extra help. And then right back to practice problems.
1 month out... I began timed practice tests. Prepare yourself for sitting there. I had trouble doing that. Reduce your caffeine intake if you're like me and consume coffee like water.
Good luck.
Not advising you to my study habits, but they helped me.