Chuck Frey has being doing some great research in preparing his Mind Mapping Manifesto and has 10 reasons why mind mapping software should be the foundation of your personal productivity system

1. It’s unbelievably flexible.
2. It can make you more productive.
3. It can help you become a better creative problem solver.
4. It helps you to identify gaps in your information.
5. It gives you a powerful set of tools to think about your thinking.
6. You can reach clarity faster on key issues.
7. It helps you to make better decisions.
8. It helps you to become better organized.
9. You can see the forest and the trees.
10. It helps you to identify, prioritize and track key project tasks.

"If you’re not utilizing mind mapping software today as part of your personal productivity system, you really ought to consider doing so."

Read his full blog  http://mindmappingsoftwareblog.com/10-reasons-productivity/#comment-1150