Learning new services

As I am progressing to offering web-mastering services as a part of what I do, I wanted to share some of the web applications/services I am learning. Being knowledgeable in what gives clients the best integrations to their web presence is key to providing the best webmaster services. Here are those services I am using and learning:

* Currently providing set-up/configuration and standard integrations as a service.

As with anything you want to learn, it takes time, practice, and a far amount of patience to understand and use as a productive tool. Do you have a favorite app that I should look at learning in order to provide set-up and configuration as a service?