Are brainstorming rules really necessary?
When you go into a business huddle, trying very hard to find solutions to some real tricky issues, there is no point trying to look for brainstorming rules to help you through the session. You might of course need to maintain a level of coordination and interdependence in order to make sure that you get somewhere close to the goal you are seeking. There is no point in making brainstorming rules if you do not know how best you are going to make them work. So, instead of creating more and more rules just learn to listen and then think.