I learned about client development and becoming more successful by reading books. The lawyers I coach frequently ask for my suggested list of books on specific topics.
Are you interested in learning more about client development and are you willing to read books to learn? If so, here is Recommended Reading 2012. Just so you know, it is not enough to just read a business book. You will want to actually implement what you are reading.
In yesteryear I highlighted and put corner creases in pages. My sister always kindly typed my highlights. If you have a Kindle or iPad with Kindle link you can actually highlight electronically and then go to your Kindle page on Amazon and print your highlights. Needless to say, I love this feature. I suspect my sister likes that I am using it also, as long as I send my printed highlights to her.