I was reminded of mind mapping after reading Tim Sneath's blog.  Last week I did a bit of Google and found a free mind mapping tool called Freemind (it’s written in Java but still has a decent UI response time!).  The keyboard shortcuts (INSERT for a new node, arrow keys for moving around, F2 for editing) make it very quick to use - I'm even thinking of using it for some talks at the PDC.

I've been using it for the last the last week to structure notes for an article, a review of the Extreme Programming Refactored book (review coming!) and even for TechEd talk that I've been listening to.  Here's a mindmap I did while I read recent articles on Test First development, for my talk at the .NET London User Group: