Rules

Set clear parameters: define the situation and problem as clearly and simply as possible.
Remember, all ideas matter. No criticism is allowed at this stage. That comes later in the problem-solving process. You want to encourage and celebrate diversity.
Welcome cross-fertilization . It is helpful to innovatively combine ideas to synergize them.
Do not worry about repetition.
Do not get sidetracked into stopping to discuss; keep on generating more.
Record all ideas.
Support “out of the box” thinking.
Make sure you are not overlooking the right-under-your-nose obvious solutions.
Encourage merging ideas from different, apparently unrelated fields.
Clarify and challenge all your assumptions.
SWOT: identify all the Strengths, Weaknesses, Opportunities, and Threats.
Change the size of the goal; make it smaller, or bigger. How would you respond in each scenario?
Look at your resources. If there were no issues related to time, people, money, and/or supplies, how would this change things? What would you then feel free to do?