From the horses mouth.
http://www.stevenpressfield.com/2014/12/the-authentic-swing/
Kreativität
Daydreaming and Mental Contrasting for Goal-Fulfillment with Gabriele Oettingen
Visualisieren in allen seinen Formen und Farben! http://www.creativitypost.com/psychology/daydreaming_and_mental_contrasting_for_goal_fulfillment_with_gabriele_oetti