Don’t deliver the ball with the right foot in front.
Don’t step on or over the foul line.
Don’t think you can change the course of the ball after it has left your hand.
Don’t expect a “strike” every time you hit the head pin.
Don’t blame the pin boys if you get a split. They will spot any pin you call their attention to.
Don’t throw away a “spare” because you think you were entitled to a “strike.”
Don’t use any unnecessary motions.
Don’t exert yourself. Take it easy. A slow accurate ball is better than a swift wild one.
Don’t put your whole thumb in the finger hole. One joint is enough.