Witness the powers of mind mapping!
Instead of figuring out how to put one together yourself, text2mindmap has developed a site where you can enter in your ideas in an outline format and Text2mindmap will generate a fully interactive map. You can move the segments of the map around to see how each word or idea is connected to another.
The site is in beta and configuration options are limited to font, color and sizing. What would be nice for future updates, is the ability to download your map to some sort of self contained application that will allow you to retain all the interactive aspects of the map instead of the static image download option currently available.