Always carry a notebook. And I mean always. The short-term memory only retains information for three minutes; unless it is committed to paper you can lose an idea for ever.

Will Self (1961- ), British novelist and journalist. One of his tips for writing fiction. The Guardian, 20 February 2010

All truly great thoughts are conceived while walking.

Friedrich Nietzsche (1844 – 1900), German philosopher, scholar and critic

A discovery is said to be an accident meeting a prepared mind.

Albert Szent-Gyorgyi (1893 – 1986), Hungarian physiologist and Nobel Prize winner, credited with discovering vitamin C.

Sleeping on a problem really can help solve it, claim scientists who discovered a nap can improve your powers of creativity. Researchers found that people were able to think more laterally and quickly after a snooze …

Richard Alleyne, science writer, www.telegraph.co.uk