People process information in many different ways. For those that process information easiest by creating diagrams, Mindmeister can help you visualize your empire. Mindmeister is a web application that has an Android component which allows you to do tree-like diagrams where one item braces to the next. This is great for me when planning businesses, as it gives me a visual representations of how the business needs to be set up and the and the details that relate to it .
The service is free for a limited amount of diagrams. The Android application is also free, and stays consistent with the look and feel of the web application.
MindMeister Web App
MindMeister Android Application