If you like mind mapping tools, I recommend 2 options
- Freemind, a well-known free software you can learn and download at http://freemind.sourceforge.net/wiki/index.php/Main_Page
- Online mind mapping with Mindmeister at http://www.mindmeister.com/
The benefit of the first one is that you get a free software running on your PC. The concern is that you have to ask hotline to install it and it is not part of the tools we normally get today.
The benefit of the second one is that it's online, so you don't need to ask anyone the permission to install something on your computer. The concern is that it's online : you need to be conencted to use it. It's my preferred option