Simplifying Complex MindManager Maps blog post has 5 great tips on making your work better organized and more accessible.
I have a suggestion to add to this list.
Consider the purpose of the Map: Presentation vs Documentation.
When doing a presentation I like to have images in their own topic. Using a walkthrough (a MindManager feature) I can visit each image along the journey. Opening a topic’s notes during the presentation is awkward and interrupts the flow.
Alternatively, when I use a Map for research or writing a document that sometimes is exported to Word then I put images in notes to keep the Map less cluttered.