New at AS 2.0

Hey guys, I’m new to the forum and the whole ActionScripting business basically.
I know my way around Flash, like I’ve made a couple animations, but never using serious AS coding.
I can make buttons that take you elsewhere, and use simple things like the “stop()” code, but not much else.
So I was looking through this sites tutorials, and they are just amazing.
I was just wondering though, what is the best way to learn coding or practice it?
All I’ve been doing lately is just copying and pasting…

Thanks in advance, guys.