No doubt that I am most proud of (cannot say I invented it, more correct would be that I stumbled upon) the agile and Maker centric TimeBlock method http://timeblock.com
We started using the method Jan 5'th 2015 and now we have a SaaS app with paying earli bird users and more users of the method not using the app.
Two of the companies using the method (besides us), attribute their growth directly to TimeBlock.