this is only my second season breeding, but this works for my animals and i.
My normal snakeroom temp is between 80-83. When i decide to start my season i will drop the room temp to the mid 70's. Now i do this with the OUTside temps. I crack a window and allow the cooler outside temps to lower the snakeroom temp. I do this for about 3-4 weeks. Then i allow the room temp to raise back up to the upper 70,s by slowly closing the window. And at this time i introduce the males.
I also crack the window when it rains here and turn up the room heater as well. They like the humidity during breeding. My boa pairs do as well.
This method works for me and hasnt failed me yet.
Hope this helps. Good luck.