I am not much for cluster diagrams, because they don't help me come up with ideas. I prefer brainstorming, where I take a few minutes, set the timer, and just write ideas until the timer goes off. Being free to jot down any and all ideas really gets my creativity flowing. I will use the story map, though. I think that is a really good idea for planning the details in my story. Create one post that answers the following prompt.
How will you generate ideas for a topic? What resources and tools can you use?