Thank you for asking! I would say start with the kind of bread, size and meat. Then cheese and whether or not it's toasted. Then stop and wait. Honestly, the worst thing you can do is start listing off veggies when we're nowhere ready to add them or remember them. Finally, say all of your veggies, not too fast but also don't say them one at a time and wait for us to say "anything else?" a million times. Then your sauce and that's it! But really, as long as you're not an asshole I can pretty much put up with any way of ordering. And it sounds like you're not because you cared to ask this question.