Something I find kind of fun to do is playing a pinball machine, but focusing on only one shot above everything else. Not only does it help accustom me towards the layout but at times, it can actually be reasonable scoring-wise to make a single shot over and over and get tons of points.
A good example would be the captive ball from Breakshot, where each hit is worth 10k incrementing by 10k per hit… but it has no cap, so in the late game, if you hit the captive ball all day, you could be getting 1 million+ per captive ball hit.
The Batmobile Hurry-Up from Batman Dark Knight is another fun thing to build up over the course of the game. In Bowen’s tutorial he spent some time trying to build the Hurry-Up to a billion points, which is… not small change on that game, and has been done.
A bad example would be the Combos in Ripley’s Believe It or Not. These are the only purpose that the left orbit serves in the game, they start at 150k, and cap at 600k. This is not a good rule to play for, because 600k is measly on Ripley’s - you could make more than that from a decently played mode.
Any other examples you can think of?