Originally posted by Ninkazu
Thanks. I started experimenting with color today, but I still don't know how the more professional comics make theirs look so clean.
You could start by using straighter lines. j/k :p
Actually Ninkazu, it isn't all that bad. I've seen worse being 'professionally' syndicated! Your style is simple and basically to the point. Obviously, the mood you're trying for is humor, so you don't need all that stylistic rendering, the likes of Joe Madueria or McFarlane. However, if you're looking to get that style, work in layers from the outline and then fill in with solids (like what u have in that pic). Then, instead of colors, use the dodge and burn tools to paint with 'light'. Those tools give you variations of the main colors you are useing instead of you having to try and colormatch the tones and subtleties that lighting gives you.
A good method of proactice would be to find a comic site with both the inked drawings and their colored versions. Then try to duplicate what you see in the colored panel using the outlined panel. 
Dave Baer
Professor of Digital Arts
Digital Media Arts College
Boca Raton, Florida
dbaer@dmac.edu