Welcome to the Ultimate version of the Shoryuken Hyper Guide! In order to push you game play to the next level it's vitaly important to understand how the game handles your character's movements, attacks, and defense options.
Check out this cool playlist for combos: http://www.youtube.com/playlist?list=PL3C70F26956D32993
Also be sure to check each characters page to learn more.
Check out this well written guide over on Reddit, also has links and discussions below, be sure to study it all!