the first part is the same with every booking all those i mentioned earlier plus i forgot the 'call the buddy' part in the minute you put the money in your bag.
in the minute when you receive the money look at your watch and the 2hrs start. some girls start the time when they enter the room, depends on you. 2hrs you have plenty of time you can talk a lot, play, sex, chill, sex again, talk or anything but only after you received the money! that is in the first 5 minutes.
usually when its advance booking men prepare as well, much more than for short notice bookings, they buy wine, champagne as well. dont worry he will definitely be more of a nervbag than you as he fantasized about you all day and he will also worry if its gonna go up in the right moment at all! some men are so nervous when they meet you they forget the money part! its not their intention but often they are so forgetful and nervous. i find it cute. so just say to him 'get the business out of the way' firmly and they say 'oh sorry sorry of course'.