A couple of students on my logo design course asked me if I could share any more information to help them with their mindmapping. I have put together a couple of videos for you. The first video goes into detail using an example of how to create a mindmap to generate logo ideas. The second video shows you a few pieces of software that will allow to to mind map digitally if you prefer.
How to Create a Mind Map to Create Ideas for Logo Designs
Creating Mind Maps Digitally on your Computer
Mindmapping Sites and Software Mentioned in the Video