Get the group to associate freely around an issue, a statement or a word. Make a note of every suggestion from every participant:
no idea is wrong
no one is to comment on other people’s ideas
agreement is not required
keep it going. All that matters is getting numerous alternatives uninhibitedly
It is only when suggestions stop coming or the time is up that the group moves on to sorting, valuing and developing the ideas.
Brainstorming can be done as a competition: the winner is the group that produces most suggestions in the allotted time. It can also be done individually: each participant is given 4-5 post-it slips and writes one suggestion on each of them (the suggestions on the fourth or fifth slip are usually the most interesting).