At its most basic, brainstorming is listing ideas. If you're having trouble coming up with a good topic for a paper, sometimes it helps to write down every idea that occurs to you, even the bad ones, until you have a strong list going.
Brainstorming is useful for figuring out what you're interested in. The technique can take many forms, but perhaps the of them most effective is that it draws on the power of interaction. We've all had those great conversations in which someone says something that sparks an idea or memory in someone else, which then sparks a further idea, and before you know it, everyone is feeling energized.
You can create one of those conversations about the topic of your paper. Just start a chat with a friend or a group about the topic and have your pen and notebook handy. Jot down notes as the conversation progresses and you hear ideas that spark your interest. For an essay on the women's movement of the 1970s, you might generate the following list by talking with friends or calling your mother:
- equal pay
- choice of career
- freedom
- purpose in society
- valuing the "feminine"—still an issue?
- messages girls get now
- effects of the movement on men
- successful or not?
Another way to brainstorm is to read an article or a book chapter on the topic and write down whatever occurs to you as you read, even if it has nothing to do with the text. You're interacting with the text like you might interact with a person, letting the author's ideas spark new thoughts in you.
You can also brainstorm in a group if you're working on a writing project with a partner or a team. Find a whiteboard, pick someone to write, and record ideas, topics, and notes as they come up. In addition to being helpful in finding a topic, this process can be fun and help break the ice with your fellow students so that everyone feels as though they can share in the discussion.
Once you've generated a lot of ideas through brainstorming, you can choose a few of them to do further prewriting exercises with to eventually create your thesis statement. Perhaps the most important thing to remember about this process is that "there are no bad ideas in brainstorming." While this saying is not strictly true—for example, it would be a bad idea to tackle an assigned essay about feminism in the 70s by writing about the life cycle of the lunar moth—it is valuable because it helps you remember that brainstorming isn't about coming up with a perfect solution. It's about considering your topic on many levels until you find an approach you're excited about.
No bad ideas
Sometimes, it helps to stop censoring yourself and write down every idea you have—even the bad ones. You can decide on the best one later!