Personal and spiritual growth happens with the spiritual disciplines;

•  Worship
•  Scripture reading and study
•  Prayer
•  Fellowship with other believers (small groups)
•  Serving (both near and far)

Some have described this as a journey toward personal transformation.  These disciplines are not "good works" done to achieve approval from God, but practiced as a means of allowing His Holy Spirit to do His work of shaping and changing our lives to be conformed to Him.