You know, some cartoons actually follow the old teachings but the authors usually add some fiction into it so that it's a little bit more interesting.
Some techniques are very useful and some are very wrong lol. Take dragonball Z...The idea is right, but it doesn't work exactly that way...everything they've said in there is correct but...flying, transforming, stuff like that, not gonna happen lol
but the way they manipulate energy is correct...they just can't be THAT strong to withstand punches off of 3000 feet, land on solid concrete and say "ouch"...it just doesn't work that way...
Back to the subject:
The key to aerokinesis is to breathe and feel the element.
Visiulize the moves of the element, how it feels like when it clashes into you so gently, how it feels to feel the breeze.
When you got the feeling, you need to feel the element as a part of your body. Move it like you move your hand. i know this is head a lot, but you really do need to become ONE with it.
and yeah...Avatar is a great anime ROFL!
Just watching it and it's great!