See I think I might do things quite differently to a few people cause I only take bookings via email/AW messages 99% of the time and I actually find it works quite well for me. It might be worth noting though that I only do this part time, so it may not work out otherwise.
I've stopped replying to one line emails saying stuff like, "Are you free" "Are you available" because I simply can't be bothered to have to find out if it's an incall, outcall, how long for etc etc.
I also don't reply to pointless essays, copy and pasted messages, anyone with negative feedback and to anyone asking for stuff I clearly state I don't offer. I.e. Car meets. I do seem to be quite good at spotting who's genuine who not.
My profile is very quick to read and if they haven't got time to read it then I haven't got time to make a booking with them. That might be a little cutthroat but it works well enough for me. X