Spiritual growth is a crucially important topic. The goal, of course, is spiritual maturity which is described on the Following Jesus (discipleship) site. look at that page also to see what God says about our growth.
This site has lots of resources to help you grow spiritually. See, for example, the Spiritual Practices section. Otherwise, just use the menu above.
To learn more about helping others to grow spiritually, use the disciple-making site, especially the section on training.
How To Love Those Who Spit On You - Martin Macaulay - Spiritual growth so as to be more like Jesus.
How To Guarantee You WON"T Grow Spiritually - Daniel Darling (Church Leaders)