I've been using mindmaps for a couple of years. I like them.
Years before that I took a course from a company called Decker Communications, Inc. on public speaking. They recommended putting key words on post-its. They didn't talk about mindmaps explicitly but that is what they were doing.
I just prepared a little talk I am giving tomorrow. The prior talk I did with a mind map. This time I used 2"x1.5" generic post-its. They are great! You can shuffle them around and recluster with ease.
Try it. You'll be glad you did.