Creativity requires freedom.  The ability to desire and dream with impunity.   That doesn't happen by accident.  You have to enable and defend it.

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• Remove the cost of failure
  
• Stand between your team (and their creativity) and danger (rejection, judgment)
  
• Once earned, make sure the brushstrokes are big and colourful, otherwise nothing changes
  
• Growth and development is done in consistent single-digit developments.  Innovation is often done in grand moments that emerge from the daily disciplines
  
• Dream big.  You're going to fail anyway - why fail at something small?