Robert Dilts has been a pioneer in the field of Neuro-Linguistic Programming (NLP) since its creation in 1975. He spearheaded applications of NLP to areas like education, creativity, health, and leadership. Some techniques he developed include reimprinting, integration of conflicting beliefs, and neuro-logical levels. Barriers to creative thinking include habit, not being taught creativity, focusing on one right answer, following rules without questioning them, avoiding ambiguity, and believing creativity is not one's area. The creative problem solving process involves defining the problem, gathering facts, restating the problem clearly, brainstorming alternatives, evaluating options, implementing a decision, and evaluating results.