Letting people know it’s your birthday is an art. You must be crafty, smooth, and above all, modest. Doing it right can get you a discount on your favorite breakfast or free champagne with your fancy dinner (which isn’t the point, of course, but it is a nice way to kick off the year) or it can even make an otherwise crusty waitress smile. Tread lightly though when you mention it’s your birthday. Nobody likes a birthday pig.