Here is an excellent example of a concept map that a Writing Club member sent me recently, and which I'm including with her permission. You can click on the picture to see an enlarged version. Here's (some of) what she had to say about it:
I'm finding this a very easy way to visualize my grounded theory...She has removed any identifying information. But I think this visual gives you a good idea of how using visual techniques can clarify and yes, inspire.
I used a very simple program called Inspiration - you can get a free trial at Inspiration.com. The program is designed for kids, so it's very easy. I purchased the software for making flow charts for a different project, but now that I have it I use it for all sorts of things.