Tee ay eye
Smash Hero
If you don't, you should. I made this video because shield DI isn't nearly as close enough to being "common knowledge" as it should be. It's not in Wak's AHTP, but it's briefly mentioned in "The Official Everything Thread." In other words, it wasn't really taught to you when you were a noob, so there's a decent chance that you don't really have much of a concept of it consciously.
Use it in conjunction with lightshielding, if you're not already.
http://www.youtube.com/watch?v=53t9fDzdCyw
Practical applications:
-Multiple hitting d-smashes (e.g. Peach, Sheik, Pikachu)
-Rapid jabs
-Shield pressure from Fox and Falco
-The lightshield edgehog vs Marth
-Other multihit moves on shield
-Falcon's raptor boost on shield
-Strong attacks on shield that may seem unpunishable (like certain spacings of Falco's f-smash or d-tilt)
Informative posts:
Differences between SDI and ASDI:
http://www.smashboards.com/showpost.php?p=13729311&postcount=16
How rotational SDI works:
http://www.smashboards.com/showpost.php?p=13729344&postcount=18
Use it in conjunction with lightshielding, if you're not already.
http://www.youtube.com/watch?v=53t9fDzdCyw
Practical applications:
-Multiple hitting d-smashes (e.g. Peach, Sheik, Pikachu)
-Rapid jabs
-Shield pressure from Fox and Falco
-The lightshield edgehog vs Marth
-Other multihit moves on shield
-Falcon's raptor boost on shield
-Strong attacks on shield that may seem unpunishable (like certain spacings of Falco's f-smash or d-tilt)
Informative posts:
Differences between SDI and ASDI:
http://www.smashboards.com/showpost.php?p=13729311&postcount=16
How rotational SDI works:
http://www.smashboards.com/showpost.php?p=13729344&postcount=18