I really enjoy seeing process, so I thought I'd show a little. This is a progression from thumbnail to final for a page from my latest Rex Steele story for Afterworks 2
Once I have a thumbnail I like, I'll enlarge it to letter size on a copy machine (or printer). Then I'll put it on a light box, pop another letter size sheet on top and tie down the drawings. I do this to maintain the proportions I worked out on the thumbnail.
Once I have a rough I'll enlarge that slightly (maybe 10%), put it back on the light box to ink. I usually ink on a large sketchbook paper (I need something thin enough to see through it), and with a brush, brush pen, and a Micron or something similar for the fine lines. Then the finished inks are scanned as bitmap line art.
Once all that is done, I'll spend too much time fretting over what colors to use, try alot of pallets that don't work, and eventually get to something I can live with.