I've been drawing since god knows when, and I can say that I've developed as an artist in general. I took up things such as stenciling [tags, graffiti that guerrilla art shit] then I did monsters, and fantasy characters with machine arms etc. Back when anime was fresh and new in the USA [or not as mainstream] I started picking up the "anime" style of drawing- now
Check out Conceptart.org
Check out the forums there and post your art. This is a very good way to improve. As an art student, I found the site extremely helpful.
how abt joining an art school.