Creativity: A Short and Cheerful Guide
By John Cleese

Creativity can be seen in every area of life—in science, or in business, or in sport. Wherever you can find a way of doing things that is better than what has been done before, you are being creative.

You can teach creativity. Or perhaps I should say, more accurately, you can teach people how to create circumstances in which they will become creative.

A few keys

Creativity can be improved.
Approach your craft with childlike curiosity.
You need time in solitude to be creative.
Be comfortable with ambiguity.
Look for inspiration from others.
Be ok with setbacks.

The Unconscious 

This is how I began to discover that, ...