I can get:
Three in each finger– two from the knuckle and one from the joint in the middle
One in each thumb
Two in each wrist, just by pushing down on it when I feel pressure
One in each elbow
One in each shoulder
One in each hip
One in each knee
One in each ankle
One in each toe, excluding my big toes
And two in each of my big toes
That's fifty-two cracks total, in one round. I can repeat all of them about three times a day, except for my fingers, which I can crack at almost hourly intervals. I don't even want to bother to total all of those up.