Here's my personal timeline for my Step 1 exam that I took on 5/16/08. I scored a 240/99 (84th percentile, see USMLE Score Myths Debunked) on the exam.
2/7/08 - Step 1 Starts Now
4/18/08 - Gems for USMLE Step 1 Studying
5/4/08 - Ideal Learning: "Surrender to this Algorithm"
5/28/08 - USMLE Experience: Summary of my study plan and execution
5/30/08 - Question Banks: Options, Pros and Cons
6/10/08 - Top Ten Tips for Step 1
6/23/08 - Cognition for the USMLE Step 1
6/24/08 - Test Taking Strategies: Three methods for tackling multiple choice Qs
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I took the Step 2 exam on 6/16/09 and I did a little bit better on this exam -- 242?
1/31/09 - Study Biases with Fun Eponym Mnemonics
2/8/09 - USMLE Step 1 score: a pissing contest (not my second opinion on the matter, obviously)
2/22/09 - Top Ten Study Methods and Habits
6/28/08 - Five Tips for your Big Day (Test day!)
Hope it helps and Good Luck! :)