This is a good, quick description of what mindmapping is, when applied to its use for note taking. It’s a little short on specifics and examples, so you’ll have to browse further on mind-mapping.org for those.
Whether you have vegetable or royal aspirations, I can confirm that you'll find mindmapping a great way of calming yourself down when you have many calls on your time, ideas buzzing round your head and objectives to meet. But it must fit your own personal style of thinking, and you must set aside the time to do it! That's how I bust stress, not by mapping out my stressful times. But we're all different, and maybe this will work for you.
To each individual reader, mindmap topics don't come much bigger than this -- on the personal level, anyway.
This piece sets out what seems to me to be a novel use for mindmapping: Staffing a project, functional unit or department. It is a good illustration of the flexibility of the mindmapping approach. I often use mindmapping in drawing up job specifications and candidate profiles, but not quite in the way described here. I think I'll give it a try.
Here is another slant on getting your writing going -- research and a dash of mindmapping.