How do you stop yourself from overbuilding early versions?

Building the actual code is always the easiest part figuring out what to leave out is where the real struggle is. I made the exact same mistake with a tool for a local shop owner spent days adding extra features that they never even clicked once.

Asking what they look at first thing in the morning is such a smart filter to cut out unnecessary work.

Did your cousin eventually warm up to any of the other views, or is she strictly using that single list?