Visual frameworks: patterns to help you think creatively

 https://visualframeworks.com/

How To Become An Idea Machine eBook

 

https://www.ideasgrab.com/

Give Space to Creativity (by SAP)

https://experience.sap.com/designservices/approach/mosaic

Mental Models - How To Think Like Successful People

Mental Models - How To Think Like Successful People from Andreas von der Heydt

Milanote - The notes app for creative work

https://www.milanote.com/

21 Card Decks for Creativity

http://emergentbydesign.com/2012/10/25/21-card-decks-creative-problem-solving-effective-communication-strategic-foresight

IdeaPaint - Dry Erase Whiteboard Paint for Home, School, and Work

http://www.ideapaint.com/

33 Things I Know About Art Direction

http://noteandpoint.com/2011/10/33-things-i-know-about-art-direction/

How To Be Creative

http://changethis.com/manifesto/show/6.HowToBeCreative

Gamestorming: A Playbook for Innovators, Rulebreakers, and Changemakers [Paperback]

http://www.amazon.com/Gamestorming-Playbook-Innovators-Rulebreakers-Changemakers/dp/0596804172/ref=pd_sim_b_2

Design Criticism and the Creative Process

http://www.alistapart.com/articles/design-criticism-creative-process/