I attended an Evangelical mega church for a good while. There also happened to be folks leading who were from various backgrounds.
I noticed that there were many more opinions on the tools for ministry. They included software, daily devotional books and various guides. Pastors might want consistency and proper doctrine by establishing his own preference. I see a place for various media tools, but with that was a tendency to substitute the devotionals for the raw Word of God. I have a pattern that works for me and that's the Bible daily with insight from the Holy Spirit.
Perhaps there are many opinions on this. Mine is to encourage believers to establish a lifelong routine for daily Bible reading.
John 16:13, Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come." I believe it works for you because the Holy Spirit, The Spirit of Truth, is the one who should always be the only one guiding us.