Six Hats of Lateral Thinking by deBono

DeBono offers a very simple framework of applying lateral thinking to any problem
It is called the six hats thinking method

Blue 
- control
- process
- summarize
- overview
- conclusions

Green 
- creative thinking
- search alternatives
- PO : Provocative operations

Yellow 
- thinking positive
- constructive
- value / benefit

Red 
- Feelings/ emotions
1.Ordinary emotions:
2. complex judgements (intuition, sense, taste)

White 
- neutral
- objective
- facts
- figures

Black 
- caution
- risk
- should we follow