Markerboard concept was started on march, roughly. Close to the month end i got a better picture of the UI and its features, because of the simplicity i need to think over and over till it comes to the stage where i can start my sketch on paper.  I prefer taking notes whenever i get some new points, if iam travelling i use the phone or if iam at home i write it on the markerboard (the real one on the wall (that's how this app concept started)).

Get the Complete process: http://www.beekeepersblog.com/2012/09/markerboard-early-concept-design.html