I think this might get more attention in the General thread so I'll move it over there.
Some folks get into the plates which is cool. I usually start out with my basic land mass shapes and go from there. I do try to make things that make some sense because that makes things more believable but I don't personally get all that much out of plate tectonics and whatnot. Since I've mostly been making fantasy maps I'm not overly concerned with realities although I do aim for plausable. If I really was concerned I'd get into tectonics but I'm here for the art, not so much the math.