First thing to do as I stated in my article would be to begin fostering reconciliation between Muslim sects. This does not mean ignoring theological differences, but rather, coming to a common understanding. Second, we need to resume intensive study of the Quran and begin formulating a workable mode of governance for the 21th century. We should also begin forming organizations to campaign for these causes. The only ones I can think of are Hizb ut-Tahrir and Muslim Brotherhood, both of which are largely ineffectual. Lastly, we can begin revolution across the Muslim world.
Like I said, this will take decades, if not centuries, but it is never to early to start. How should we proceed now? Firstly, begin studies of the Quran. Rally as many people as you can to the cause. Disseminate literature, and so forth. Social media was practically built for this kind of stuff. The communities we form may seem small at first, but they will evolve. Try donating to help oppressed Muslim minorities worldwide: Palestinians, Rohingya, Uygur and Han Chinese, Shiites in ISIS territory. Small steps. Will be writing earnestly about this soon as I have the time.
Regards
wanderer