I noticed one important point mentioned in the banking app example, but not elaborated on:

Shirnk critical scope.

By this I mean if you can produce a simpler version of whatever is that you're doing and have separate tasks for expanding it, do it.

Your e-commerce solution can start off with just one payment provider. Your form validation can initially respond with just "nope!". You don't need that color picker shaped like a peacock in your MVP.

Especially if these things prevent you from delivering something that someone, anyone can use.

Also half of such things become irrelevant and ultimately get dropped.