Using the Fire Flower item you can get efficient practice of the wank DI technique left, right, and upwards.
If you are unfamiliar with the concept of DI, I strongly recommend you watch:
http://www.youtube.com/watch?v=YhXxBoWtb_k
I should reiterate that I only use wank DI to escape combos. For ledge DI, I simply use the Slide DI technique due to the fact that timing is more important that number of inputs.
Credit to DMoogle (A$) for coining the term "wank DI"