The best practice is to avoid falling from a horse whenever possible. But the more you ride horses the more it becomes inevitable that you will go down. Falling from a horse in save manner depends on many aspects. The key points are:
try to land on your feet first
turn when you fall
try to fall to the side
tuck your chin to your chest to avoid your head hitting the ground
How to fall from a horse | Ecency
My participation in the Phone Photography Contest! - #127: Preparing to return to teaching! [Eng/Esp]