Please note that this is ENTIRELY MY OWN PROCESS, and not the be-all-end-all on how to draw comic strips. I should also mention that I do it all traditionally, by hand, and make touch ups in photoshop when the need arises. I also letter by hand, and recommend it for people who want a more "home-grown" look for their comics.
MY MOST PRESSING/PERSONALLY SUCCESSFUL PIECE OF ADVICE HERE: hashing out the dialogue beforehand is the most helpful thing in the world and makes the process of drawing the actual strip a million times easier/faster.
I'm sorry my process isn't that interesting ;U