When you read myths something inside responds and is recharged by the memory of heroic deeds. The man most familiar with The Power of Myth is the man whose book is of the same title, Joseph Campbell. He has an excellent book and video series in concert with Bill Moyers that documents this theme. There are six videos, each an hour long, depicting the most basic archetypes that myths address. This series is informative and very inspiring.
Creativity also depends on a mind that is fluid, mobile and open to inspiration and intuition.
Reading myths opens up the mind and soul to the essential psychological patterns that shape our destiny. Touching these patterns, being familiar with their many guises and expressions, will help you conquer or exalt them in yourself. Another benefit of reading myths is enhancement to creative imagination. Myths generate powerful visual images in the mind. The practice of seeing visual imagery and participating in it is important to those involved in creative work.