My favorite method involves looking at some style you want to draw, then try drawing it yourself WITHOUT tracing or looking up how that artist draws things. Just draw it by sight. It won't look the same at all, believe me, but it might look like something you like and, more importantly, something that's your own style.

The trick is to not be somebody else. Be yourself. Don't take full-blown art lessons from one person; you'll simply be a copy of that person. Learn bits and pieces from various sources and assemble them into something that's YOU.

It works better that way.