21 Brainstorming Techniques That Generate Better Ideas
15 min read • Published by Alex Quantum
Most brainstorming sessions are terrible. People sit in a room, someone says "there are no bad ideas," and thirty minutes later you have a whiteboard full of mediocre suggestions.
The problem isn't your team. It's the method. After studying how Google, IDEO, Pixar, and Amazon generate breakthrough ideas, one thing becomes clear: the best brainstormers pick the right method for the right problem.
This guide covers 21 proven techniques in five categories, plus a decision table and session guide.
Why Most Brainstorming Fails
- Production blocking: Only one person talks at a time
- Social loafing: People coast when others contribute
- Evaluation apprehension: Fear of judgment kills risk-taking
- Anchoring: The first idea narrows the frame
Category 1: Divergent Thinking
1. Brainwriting (6-3-5 Method)
Six people write three ideas in five minutes, then pass papers. 108 ideas in 30 minutes. BMW uses this for vehicle feature concepts.
2. Rapid Ideation
Strict 5-10 minute time limit. Write as many ideas as possible. Time pressure activates associative networks.
3. Round Robin
Each person shares one idea in turn. No skipping. Guarantees equal participation. Amazon uses variations of this.
4. Brain Dump
10 minutes of solo writing, then group review and clustering. Removes social pressure entirely.
5. Free Association Chain
Start with a central word. Each participant says the first word that comes to mind. Review for unexpected connections.
Category 2: Analytical & Structured
6. SCAMPER
Seven lenses: Substitute, Combine, Adapt, Modify, Put to another use, Eliminate, Reverse. P&G used this to create the Swiffer.
7. Mind Mapping
Central problem with branching sub-topics. Mirrors how the brain stores information. BBC uses this for editorial planning.
8. The Five Whys
Ask "Why?" five times to reach root causes. Developed by Sakichi Toyoda at Toyota.
9. Starbursting
Brainstorm questions instead of answers using Who, What, Where, When, Why, How.
10. Gap Analysis Brainstorm
Define current state and ideal state. Brainstorm ways to close the gap.
Category 3: Role-Playing & Perspective
11. Six Thinking Hats
Six modes: White (facts), Red (emotions), Black (risks), Yellow (benefits), Green (creativity), Blue (process). Used by Boeing and IBM.
12. Reverse Brainstorming
Ask "How could we make this worse?" Then flip answers into solutions. Pixar uses this in Braintrust sessions.
13. Assumption Storming
List every assumption, then challenge each: "What if this wasn't true?" Airbnb was born from challenging "strangers won't let you sleep in their home."
14. Customer Journey Storming
Map the customer journey and brainstorm improvements at each touchpoint. Core to IDEO's methodology.
Category 4: Visual & Creative
15. Storyboarding
Sketch sequential panels showing user interaction. Invented by Walt Disney Studios, now used in Google Ventures Design Sprints.
16. Crazy Eights
Fold paper into eight sections. Eight ideas in eight minutes. A staple of Google Ventures.
17. Mood Board / Inspiration Wall
Collect visual artifacts that relate to the problem. Triggers emotional associations.
18. Bodystorming
Physically act out the user experience in the real location. IDEO used this when redesigning an ER experience.
Category 5: Convergent & Selection
19. Dot Voting
Post ideas on a wall. Each person gets 3-5 dot stickers. Most dots win. Used by Asana.
20. Impact/Effort Matrix
2x2 matrix: High Impact/Low Effort = do first. Used by Amazon and Spotify.
21. The NUF Test
Score each idea 1-10 on New, Useful, Feasible. Total 24+ = strong candidate.
Decision Table
| Situation | Best Techniques | |---|---| | New product ideation | Brainwriting, SCAMPER, Crazy Eights | | Solving a specific problem | Five Whys, Reverse Brainstorming | | Improving existing product | Customer Journey Storming, Gap Analysis | | Team feels stuck | Assumption Storming, Six Thinking Hats | | Remote/async team | Brainwriting, Brain Dump, Dot Voting | | Early-stage exploration | Mind Mapping, Starbursting | | Prioritizing ideas | Impact/Effort Matrix, NUF Test, Dot Voting |
How to Run a High-Output Session (90 Minutes)
| Phase | Time | Activity | |---|---|---| | Warm-up | 5 min | Creative exercise ("10 uses for a paperclip") | | Problem framing | 10 min | Present problem, answer questions | | Divergent round 1 | 20 min | Individual technique (Brainwriting or Rapid Ideation) | | Share & cluster | 10 min | Post ideas, group similar ones | | Divergent round 2 | 20 min | Structured technique (SCAMPER or Reverse Brainstorm) | | Share & build | 10 min | Combine and evolve strongest themes | | Converge | 10 min | Dot Voting or Impact/Effort Matrix | | Next steps | 5 min | Assign owners and deadlines |
Common Mistakes to Avoid
- Jumping to solutions — spend 50% on divergent thinking first
- Wrong people — need diverse perspectives, not just stakeholders
- No time constraints — open-ended sessions produce less
- Skipping warm-up — cold brains produce cold ideas
- Critiquing during ideation — even subtle body language kills momentum
- Not capturing ideas — if it's not written down, it doesn't exist
- One and done — great ideas often come from the second or third session
If you're working on finding a startup idea, combining multiple techniques across several sessions dramatically increases your chances. And once you have a concept, think about how to name it effectively.
Try It Yourself
Our free Brainstorm Tool lets you run a structured brainstorming session right in your browser. Choose a technique, set a timer, and start generating ideas — no signup required.