http://en.wikipedia.org/wiki/File:2007-07-13-brainstorming.gif

Brainstorming is a group or individual creativity technique by which efforts are made to find a conclusion for a specific problem by gathering a list of ideas spontaneously contributed by its member(s)
Osborn's method:
Osborn claimed that two principles contribute to "ideative efficacy," these being :
1. Defer judgment,
2. Reach for quantity

This method of brainstorming works by the method of association. It may improve collaboration and increase the quantity of ideas, and is designed so that all attendees participate and no ideas are rejected.
The process begins with a well-defined topic. Each participant brainstorms individually, then all the ideas are merged onto one large idea map. During this consolidation phase, participants may discover a common understanding of the issues as they share the meanings behind their ideas.
To me i call it a way of achieving the Eureka effect, also known as the aha! effect.

Let's brainstorm here......