Clustering is a nonlinear brainstorming technique that allows writers to generate ideas and topics for writing. It involves freely associating words and concepts around a central topic, writing each new idea in a circle connected to the previous ones. This taps into the subconscious "design mind" and helps bypass logical thinking. The process may feel random at first but patterns will emerge. Writers should trust the process and see where it leads them without premature judgment. Clustering provides choices of ideas and a focus to spur writing in a natural, non-linear way.