These are the tools of my trade: My Japanese mechanical pencil and German technical pens. They are resting on color reference guides that I use for Zero Gravity characters so that colors are consistent in all strips. By the way, yes, that is a lacquered chopstick which I hold in my left hand while inking to keep the paper as flat as possible.
Finally, I am at my computer. I scanned the inked drawing, and used Photoshop software to manipulate it by adding color, resizing and cleaning up the image and adding dialog bubbles. You might notice that I have a lot of reference materials on the shelves covering that wall. I can’t get enough books!