Colleen McFadden has a terrific piece on one of the easiest and most effective ways to grow your church: one-to-one Bible reading.
If you would like to grow as a Christian, be more disciplined in reading the Bible, reaching out to unbelievers, and discipling other believers unto maturity—and if you would like to see others grow in these ways as well—all you have to is read through a book of the Bible with one other person and talk about it.
Perhaps it sounds too simple. But McFadden has some great stories to tell about how it works.