How I unlocked $750/month of revenue from my app with a single decision

Hey Indies,

As some of you know and commented on, I launched an app called Thought Train with some awesome success back in May.

Since then, earnings plateaued and I was at a loss as to what to do, so I thought I'd play with the pricing (changing from pay-what-you-want to paid), lo-and-behold, I unlocked free revenue from the app!

I wrote about how, why and when I did this, give it a read, but most importantly let's talk about pricing, how did you decide what to charge for your app? And do you even experiment with pricing?