Tutorial for making better computer graphics?

Not displaying them with code, actually drawing them. I'm pretty good at drawing on pencil and paper, but no matter how much I practice I can't get any better at drawing graphics for my games. All I want is to make simple graphics like Commander Keen had. Not realistic just nice looking. There are plenty of hand drawing tutorials, is there any for computer drawing? I don't really understand what makes it so different and so much harder to me.

My searches have found nothing but tutorials about programming, advanced photoshop techniques, or 3D graphics.

First off, open paint. Add pixels as you see desired. Add as texture for new uber 1337 console remake of doom.

Find a nice program that fits you well and keep messing with it. It just takes practice.

Get a drawing pad for the computer.

try doing a search on www.cgtalk.com, maybe you'll find something