Many writers, psychologists, and artists have, and continue to be a source of inspiration to me. Some of my key sources are listed here, with links where they are available.

Philosophy & Psychology

I discovered the psychology of Gestalt 20 years ago when it spoke a deep truth to me. Gestalt carries within it an ordinariness, re-discovering the lost beingness in our culture of doing. Gestalt has taught me that in living my life fully, in believing in myself, enhances whatever I want to do - not the other way around.
British Gestalt Journal

The work of Carl Jung and post Jungians have brought a greater depth into my understanding of psychology and developed a language to understand our psychological root systems.

The work of Marion Woodman focuses on women and women's development with astounding insight. Working with Ann skinner, a voice work and theatre teacher, & Mary Hamilton, a dance teacher, they have combined their practices to achieve deep personal development for many women internationally, over the past 25 years.
Marion Woodman's books are worth a read, I especially recommend Addiction to Perfection
Marion Woodman Foundation.

The Arts

The inspirations of artist and art teacher Betty Edwards who uses the principles of art in corporate development.

William Ayot and David Whyte

... who bring their petry into corporate work. This poetry carries the lightest touch and achieves the deepest insights.