Here's an interesting post regarding some ways to enhance the creative process and idea development, making it more effective, by the use of four archetypal roles. Each one uses different mindsets and skills, requiring you to play different characters and roles. "Deconstructing Creativity: The Four Roles You Need to Play to Be Fully Creative" @ litemind.com/creativity-roles/
I actually have had Roger Von Oech's "Creative Whack Pack" for many years. Many moons ago we used it to help with idea development when I worked in advertising. I keep it out in my studio where I can grab it and use it when I am feeling frustrated about the way my painting is going. Somehow, it always loosens me up or gives me a new perspective on my dilemma.