I believe one of the keys to spiritual growth is hearing the Word of God preached (Romans 10:17). This should never replace personal reading of the Bible but rather be supplemental. I love hearing my pastor speak. He is so faithful in preaching God's Word. There is never a week off per se. 

I also love to hear some preachers online. If you have not immersed yourself into the world of podcasts do yourself a favor and educate yourself. I will give you three examples of great podcasts that you can receive for free online. 

The first and my favorite is Mark Driscoll. Driscoll is the Pastor of Mars Hill Church in Seattle. His leadership and passion can not be matched. He preaches with conviction, honesty, and intelligence. I love it when Pastors can be humorous yet not compromise on the Word of God. He once gave a story on grace that made me weep. I have never met him but love him greatly. 

The second man I want to tell you about is John Piper. Again, I have never met this man but he has mentored me for several years now. I find myself thinking about quotes from his books throughout the day. Piper wrote a book on missions called "Let the Nations Be Glad." No book (besides the Bible) has influenced my life more. I have never read a book where I felt as if God were talking through the author specifically to me. This book on missions ironically is what led me to become reformed in my theology. Piper is known for impacting one liners. For example, "Missions exists because worship doesn't."  Some books you may want to check out by him are: "Desiring God" and Don't Waste Your Life." 

Finally, the last podcasts I regularly listen to is called the White Horse Inn. This is a group of 4 Theologians who discuss issues of the modern American church through the lens of Reformed Theology. All four guys are reformed. They come from the Reformed Church, Lutheren Church and a Baptist Church. The Baptist Church is represented by Ken Jones. Ken Jones is an African American Pastor in Compton, California. His intelligence is unbelievable. 

Please go and check these guys out. They have helped me tremendously.