Answer:
During prewriting exercises, it is important to record everything that comes to mind without editing as you write. You can use the various techniques to generate a number of different ideas to choose from to formulate your topic.
Brainstorming can help you find where your true interests lie and what part of a topic you might want to delve into further.
Freewriting can help you generate new ideas about a topic by writing nonstop, without editing, for a set amount of time.
Clustering, or concept mapping, can help you refine your thoughts and narrow the scope of a topic by making a map or diagram of different ideas you associate with a central topic.