Don Koberg and Jim Bagnall's classic The Universal Traveler: A soft-systems guide to creativity, problem-solving and the process of reaching goals.
http://isites.harvard.edu/fs/docs/icb.topic1463867.files/T550_2014_Week_...
Arthur V. VanGundy 101 Activities for Teaching Creativity and Problem-Solving
http://www.bio-nica.info/biblioteca/VanGoundy2005101ActivitiesTeaching.pdf