Never posted here before, but I was looking through PR's sig gallery, and thought, hey, I'll look at the rest of the forums, and there was this I need soem comic book ideas, and I love comics, so I thought I'd stop by. So I did.
Anyways, the best thing you can do is quit reading comics. Read other literature and stories, and don't try to forge some immense epic story, just think of a few cool scenes--a car chase, or a fight with a little added flavor and fervor. Then think about the characters involved, think about how they got to that point, and what their motivation should be after that scene is completed, and slowly let it form into a story. That's how I do it, I don't web or outline or draft, whatever I write, I want it to be as much fun, and as much of a thrill ride for myself as for those whom I would have read it. I am not the artist, or the craftsman, I am the instrument through which this story is told, I am no more important than the pen, or the dictionary, or the thesaurus.
As for character designs--don't worry about it, just think of what's cool, or what's abstract. If it's modern day, and there's a curse and mystical stuff--some guy in a 1920's pinstripe gangster suit, with a sweet hat and a Thompson gun should fit perfectly! And you know why? Because he's not supposed to fit, because that look is so outdated it's almost become new and different and expressive.
If you try too hard to create, all your creations will suck, just chill out, and let it flow.
That's what I do anyways.