I tend to get really great service from shops, sometimes even discounts that aren't generally available. Why? Because I use a few simple tricks for being a great customer.

1. If there's a menu, look at it and use words that exist on that menu.
2. If I've been there before, present all the information needed to produce the correct outcome in the order they want that information at a pace that they can process it.
3. Please, thank you, don't invite them to come to my place and get naked.