Include a note inside the box with your contact info if you're a first-time customer.
Do NOT simply drop your watch in the mail without checking first. ASK before sending anything, if only to verify that we're not on vacation, flat on our backs with the Chinese flu, or so far behind that we're not accepting further work.
Do NOT ship your watch with a chain, fob, or strap attached. It can scratch the crystal or the case, and it adds to the boxed weight, costing more in shipping.
Do NOT ship your watch packed in confetti, sawdust, or shredded paper because someone has to sweep up that stuff after it spews all over our clean floor.
Do NOT ship your watch wrapped in layers of packing tape to the point where it has to be sliced open. Whatever you pack at your end has to be unpacked at this end.
Do NOT write or call asking about status updates for your watch. There are always others in queue ahead of you and we will let you know when its turn on bench arrives and send you updates from that point on. Pestering the watchmaker will not make him work any faster.