I'm a regular reader of author-pastor Mark Batterson's blog E-votional.com. He just put up an excellent post on discipleship here. Here's a snippet:
We cannot reduce the gospel to the forgiveness of sins. It's about glorifying God by maximizing our God-given potential and serving our God-ordained purpose. It can't just be about creeds. It's got to be about deeds. It can't just be about us. It's got to be about others.