An amazing and perhaps prophetic movement is under way.
It is called Operation Global Rain. It started when a few churches in Central California decided to hold a 10-day prayer event after the model of the early church found in Acts 2. There were no keynote speakers, but rather a group of disciples pleading for nothing else but the outpouring of the latter rain. Every night from 7 to 8 pm, a theme sheet with Bible verses and S.O.P. quotes was presented. We read these privately and then prayed, sometimes silently, other times in groups of two, and others as a congregation.
Though done at separate times, the churches all experienced revival. Animosity was laid aside and a true spirit of unity, repentance and mission took hold of the members. The idea then came about: What if all the churches in the conference were to petition the throne of God at the same time , for the same thing, the outpouring of the Latter Rain. http://operationglobalrain.com/

Read the articles at the site -- many of them talk about the need for reformation (obedience, change of habits, etc.) prior to revival.