At first I also couldn't get mindmapping to work for me. It's only been 2 weeks since I've made it work. Before that, I used the tree diagram notetaking method I revised from playing around on my computer's registry, and adapting that to notes I took in Microsoft Excel. This is how it works:

Main heading
[tab]subheading
[tab][tab]sub subheading
[tab][tab][tab]sub sub subheading
you get the point. you can go as deep as you want. There would be as many mmaps as you'd want that way, maybe one or two to show general points and all details.

It's like mindmapping on a computer so conventional notetakers would understand it, but each category has subcategories with the extra information in them just like a mindmap. Think of it as a way to bridge the best of conventional notetaking with mindmaps in case you want to move back and forth between the two.