• groups aren't always strict in following the rules of brainstorming, and bad behaviors creep in. 
• people pay so much attention to other people that they don't generate ideas of their own – or they forget these ideas while they wait for their turn to speak. 

On your own, you don't have to worry about other people's egos or opinions, and you can be freer and more creative.

• Individual brainstorming is most effective when you need to solve a simple problem, generate a list of ideas, or focus on a broad issue. 
• Group brainstorming is often more effective for solving complex problems.

• You can take advantage of the full experience and creativity of all team members. 
• When one member gets stuck with an idea, another member's creativity and experience can take the idea to the next stage. 
• It helps everyone feel that they've contributed to the solution.
• Great teambuilding exercise.

1. Prepare the Group: set a comfortable meeting environment, consider who will attend the session and how much preparation is necessary in advance.
2. Present the Problem: clearly define the problem that you want to solve, and lay out any criteria that you must meet. Give people plenty of quiet time at the start of the session, then, ask them to share their ideas.
3. Guide the Discussion: encourage everyone to contribute and to develop ideas, including the quietest people, and discourage anyone from criticizing ideas.