The Golden Rule is also a great way to approach product development. I'm currently researching push notifications for Flotilla, and it's easy to decide the strategy I want to go with, because I know what kind of notifications would be useful to me.

Going this route means that you appeal more strongly to a smaller audience, because people are weird, and your preferences may not be universally shared. This flies in the face of the data-driven conventional wisdom about designing products. But I think it is far better, because it results in a higher diversity of solutions in any given space, that are higher quality from the perspective of their target users. Loving people from your authentic self has compounding benefits.