The biggest challenge for us was a bunch of small tasks that we HAD to do. It was driving us nuts until we realized we could either find a service, make it dead simple (MVP style) or just not do it until we absolutely needed to do it. We worked on being customer obsessed with the absolute list. We ended up with a great product. I can't take full credit, took a lot of advice from great blogs and Lean Startup (the summary is better if you don't have the time. http://amzn.to/2H8isRI).