Dr. Maxwell Maltz

Psycho-Cybernetics is a self-help book written by American writer Maxwell Maltz in 1960. Motivational and self-help experts in personal development, including Zig Ziglar, Tony Robbins, Brian Tracy have based their techniques on Maxwell Maltz. The book combines the cognitive behavioral technique of teaching an individual how to regulate self-concept, using theories developed by Prescott Lecky, with the cybernetics of Norbert Wiener and John von Neumann. The book defines the mind-body connection as the core in succeeding in attaining personal goals.

Quotes

Close scrutiny will show that most "crisis situations" are opportunities to either advance, or stay where you are.
Study the situation thoroughly, go over in your imagination the various courses of action possible to you and the consequences which can and may follow from each course. Pick out the course which gives the most promise and go ahead.
You can do only one thing at a time. I simply tackle one problem and concentrate all efforts on what I am doing at the moment.