John Piper offers this helpful advice to pastors about reading:
Now don’t get me wrong. I don’t mean we should limit our reading to quick shots one or two time a day. But if you will use severe discipline to make regular short appointments with a given book, you can live in another great mind more than you thought you could – beyond the more extended times you set aside for study and sermon preparation.
Nor do I want to give the impression that I think there is virtue in reading many books. In fact one of my greatest complaints in seminary was that professors trained students in bad habits of superficial reading because they assigned too many books. I agree with Spurgeon: “A student will find that his mental constitution is more affected by one book thoroughly mastered than by twenty books which he has merely skimmed, lapping at them.” God save us from the allurement of “keeping up with Pastor Jones” by superficial skimming. Forget about “keeping up.” It only feeds pride and breeds spiritual barrenness. Instead devote yourself to boring in and going deep. There is so much soul-refreshing, heart-deepening, mind-enlarging truth to be had from great books! Your people will know if you are walking with the giants (as Warren Wiersbe says) or watching television. (John Piper in Brothers, We Are Not Professionals)