This is not a good example by any stretch, but here's how I did it. Learn from my mistakes!
Start studying for MCAT?
Took a PR class from January to March with intention of taking in April, had to cancel due to illness. Rescheduled for earliest date--3rd week of June. Spent six weeks studying after school let out.
June 21 (did not receive scores until July 24)
Submit primary application?
Very nearly canceled my scores cause I thought I had done really poorly, so assumed I would have to retake the test and did not pre-write anything. Shocked by my scores, had to scramble to finish my application/personal statement and completely revise my school list. Submitted August 1.
Submit secondary applications?
Submitted secondaries from 8/7-9/29 (verified 9/11, so all of my secondaries were turned around within two weeks).
DO NOT DO THIS TO YOURSELF. A much better plan would be to take the MCAT at the earliest date that you think you can do well, start writing everything and submit on June 1 or thereabouts. You only need to pay for one school to be added to the queue, so pick one place that you'll apply to no matter how your score turns out and hit submit early. Then start writing your secondaries (almost all are available on the forums) so that when they arrive, you can turn them around within a day or two.
***Also, turn in EVERYTHING early--transcripts, letters, etc. There were a lot of people who turned in everything but LoR's in June but couldn't be considered complete at schools until September due to a late committee letter. Don't be that person!