MindMeister — I think visually, and I have problem thinking straight. Then someone taught me how to use mind map, and I have loved the method ever since. I started by using MindManager by Mindjet, which has worked well for me in the start, but as I eventually ditched Windows, the Mac version of MindManager did not work as well as I liked it before, moreover, portability of information became an issue. Unless I lugged my laptop around, otherwise it was difficult for me to bring my maps around, or add in new ideas as they became available. Then I found MindMeister, that offers Mind Mapping software that runs on the web, as well as on my iPhone. Now I just hope its iPad version will be made available when iPad launches in Singapore.