[Callers] Confirming Bookings - Best Practices?

What do folks do to ensure dance booking contacts remember that they've booked you? I just had my second booking in a row in a certain geography forget that they had booked me. What's curious is that in both cases these dances approached me by email (I could understand it maybe if it were the other way around?), we had an exchange where we clarified the dates, etc. and confirmed we were all set. We agreed to connect again with any final questions on program, accommodation, etc. as we approached closer to the date. The first case turned out to be rather comical in their confusion - the second I can't figure out. So, short of calling/emailing monthly, what do YOU do to ensure folks remember their booking commitment with you? Thanks, Don