Having been in hobby for over 3 years I have seen, and heard of some colossal fails when it comes to dealing with the ladies.
1. Talking about your dick.(they could care less, and want to hear it even less)
2. Excessive communications.(your time starts when you show up for appt)
3. Not including all relevant info in 1st contact.(they want to know whether or not to give you an appt, don't give reason to be NO)
4. Questioning their looks or TCB in public.(ask that privately)
5. Being nosey.(they don't want you asking private info)
6. Being pushy.(huge turnoff to be pushy)
7. Don't show up early.(they are almost always getting ready just before appt)
8. Don't try to tell them how to run their biz.(most have been doing this long enough that you can't come up with anything they haven't encountered)
9. Do not no show, be late, or cancel last minute.(it will be talked about)
10. Be a gentleman.(they won't see someone who is not, and it will be talked about)
Well that's all I can think of off the top if my head. All of these mistakes happen with great frequency.
Feel free to add to the list ladies and gents, I will combine into a cohesive list when the thread is finished.