If you are in the WordPress world, I wrote a blog post which may be interesting for you. It explains why it is important to offer your clients the website maintenance as part of the business and how you can use ManageWP for that. You can read it at ManageWP blog. I hope you will enjoy it.
I recently wrote a blog post for my friends from MVPWorkshop about the importance of being focused, how you can get the feedback from your customers and what you can actually do with that feedback in practice.