Ride it into the ground until it stops or you can't hold on. Pick up a mini dirt bike and add bark busters and practice grass track figure 8s and ovals. You'll get plenty of practice. Keep your grip. it stretches you out and you don't try to catch yourself by reaching out, which doesn't work anyway but it is instinct for us at walking speeds we were designed to operate at.
I don't get thrown as much as I used to, more low sides, so I usually avoid broken arms, wrists, collarbones. ACLs are another story.
P/S/, getting older and slower helps too!
