When I'm working through a problem with Cursor, I find platitudes go a long way to keeping it grounded. However, when it really refuses to do something then then best way to break the pattern is harsh, stern wording.
For example, if it's written code that's mostly correct but needs some tweaking, a platitude will keep it second guessing everything it just wrote.
* "That looks great so far, can you tweak XYZ" -> Keeps the code I care about while fixing XYZ,
* "Can you tweak XYZ" -> often decides to completely rewrite all of the code