Pretty much go with the flow, but certain games I try to make certain shots or try a strategy specific to the game. Play on the fly but think about where I want to send the ball.
( I avoid for the most part any shaking or nudging the machine. Don't want to add wear and tear on the legs and cabinet connections. They probably all had enough work back in the day )
Play for fun and like to have friends and guests play them too. Go with the flow and have fun.