Get a group calling out ideas fast, with judgment on hold, so one thought sparks the next.
Brainstorming is the classic group method for producing ideas. A small group faces one clear question, people call out ideas, and someone writes every one where all can see. At this stage the goal is quantity. You are filling the wall, not picking a winner.
It runs on four rules. Hold back criticism. Go for as many ideas as you can. Welcome the wild ones. Build on and combine what others say. The rules matter because the quickest way to kill an idea in a meeting is to judge it, out loud or silently, before it has been heard. Separate the making from the judging and a group becomes far more inventive.
Done carelessly, brainstorming lets the loudest voices take over while everyone else waits for a turn. A sharp question, a few silent minutes at the start and a firm facilitator fix most of that. If your group is shy or uneven, try Brainwriting instead.
Use it when you need a wide range of options quickly, the group brings varied knowledge, and people are comfortable thinking out loud in front of each other.
Steps 1–4 generate and step 5 judges. Keeping them apart is the whole trick.
Choose a part of the diagram or a tab to explore each step.
What one “How might we…?” question do we want as many answers to as possible?
Does everyone know the rules, and who will keep them?
How many ideas can we get on the wall in the next 15 minutes?
Which idea on the wall could we stretch, flip or combine with another?
Which themes stand out, and which ideas are worth testing?
Brainstorming is easy to dismiss, but each of its rules targets a real habit that stops groups from thinking well.
In ordinary meetings people filter their ideas before saying them, for fear of looking foolish. Psychologists call this evaluation apprehension. A firm no-criticism rule lowers the risk of speaking, so more half-formed ideas reach the wall, where others can help them grow.
Memory works by association. Hearing someone else's idea opens paths in your mind that you wouldn't have found alone. That's why the rule to build on others matters: the best idea often arrives third or fourth in a chain.
The first ideas in any session are usually the obvious ones everyone already knows. Pushing for volume forces the group past them. Studies of idea generation generally find that groups who produce more ideas also produce more good ones.
Only one person can talk at a time, and people forget ideas while they wait. Researchers have repeatedly found that people who think alone first, then pool their ideas, often produce more. So start with silent minutes, and keep voices balanced.
Phrase it as “How might we…?” and make it specific. “How might we cut car traffic at school pickup?” beats “Traffic ideas?”. Write it at the top of the board and check that everyone reads it the same way.
Invite 4–10 people with different knowledge: someone close to the problem, someone new to it, someone who will have to make it work. Choose a facilitator who stays neutral and a scribe who writes fast.
Read the four rules aloud and pin them up. Then spend two minutes on a silly practice question so people get used to saying odd things out loud.
Give everyone three minutes to jot ideas alone. Then go around the room once, then open it up. The scribe writes every idea, numbered, in the speaker's words. Aim for a target, such as 60 ideas.
Lulls are normal. Restart with a twist: “What would a hotel do?”, “What if money were no object?”, “Combine #12 and #30.” The ideas that come after the first lull are often the freshest.
Stop generating before anyone judges. Cluster the ideas into themes, then shortlist with a dot vote or a NUF Test. Keep the full list: today's reject may solve next month's problem.
A whiteboard or flipchart, markers, a timer, the question written large and the four rules posted. One facilitator, one scribe. With AI, start with the prompt below.
Setting: a small city's transportation office. Goal: fewer idling cars and safer crossings by next fall. Constraint: almost no budget. Group: eight people from the city, the schools and the parent association.
The group reworded “fix pickup traffic” as “How might we get kids home safely without a line of idling cars?” Focusing on kids, not cars, opened new doors.
Two minutes on “uses for an orange traffic cone” had the city engineer and the parent association chair laughing and calling out ideas side by side.
First came the familiar: staggered dismissal, more crossing guards, idling fines. Then a bike train, pickup by text message and a “kiss and go” lane.
“Walking school bus” (#14) plus “park at the church lot” (#31) became a staffed walk from a lot four blocks away. “Ban all cars” became a car-free school street pilot.
The facilitator stopped generating at 25 minutes. The group sorted 71 ideas into four themes: timing, walking and biking, parking, and talking to parents.
71 ideas, four themes and a shortlist of three after a dot vote. The wildest idea, closing the street, made the final three.
A brainstorm stalls when the obvious ideas run out, and that is exactly when AI helps most: it can throw in fresh angles in seconds. But it doesn't know your people, your politics or what's been tried before. Let AI widen the list and restart the room; let the humans judge what fits.
Before the session, ask for several ways to word your question, from narrow to broad.
Reword this as 5 different 'How might we...?' questions, from narrow to broad: [problem]
When the room goes quiet, ask for prompts that push the group somewhere new.
We're stuck at 40 ideas on [question]. Give me 5 'what if' prompts that push us somewhere new.
Feed AI two ideas from the wall and ask for hybrids the group can react to.
Combine idea #14 (walking school bus) with #31 (church lot parking). Give me 3 hybrids.
Paste the raw list and let AI propose themes, which the group then checks and renames.
Group these 70 ideas into 4-6 themes. Flag duplicates and any idea that fits nowhere.
Describe your question, pick a mode, then copy the prompt into Claude, ChatGPT, Gemini or Copilot. In coach mode the AI runs the session like a facilitator: you go first, it builds on your ideas, and judgment waits until the end.
The “Open in” links put the prompt in the web address. If your challenge includes anything sensitive, copy and paste instead.
After the session, click one to copy it, then paste it into the same chat.