The front page of Shoryuken now includes a number of excellent Strategy Corner articles. A recent highlight of this series is A Quick Guide to Reaction-Based Defense by Thelo, a Canadian HDR player who made top 8 at EVO2009 and mains E.Honda.
As someone who’s playstyle favours the “down-back” position, I found this to be an excellent discussion of the difference between reaction and prediction in fighting games. Even if you prefer an offensive style of play, it helps to understand how to attack to minimise your exposure to reaction-based defense.
Follow the link to read the full article. This is relevant for all the SF4 players out there who need to understand why randomly hoping for the best (e.g. jumping or uppercutting as a “guess”) is not a good place to start.