Fans of Brian Eno will have heard of his ‘Oblique Strategies’ – a set of cards he created with artist Peter Schmidt, with tips to help creatives come up with ideas. Two tips I really like are: ‘take away the elements in order of apparent non-importance’ and ‘use an unacceptable colour’. Other good ones are ‘use an old idea’, ‘honour thy error as a hidden intention’ and ‘look closely at the most embarrassing details and amplify’. I often refer to these when working on a design.