Sometimes he wrote them down, but on long rides he used a mnemonic device: to remember each insight he had, he would pin a small piece of paper to an area of his clothing that he associated with the thought.
He said it didn't, but it did help him remember telephone numbers -- he could see and read the sequence of numbers as colors -- a very different experience than say, rote memorization or deliberately assigning specific colors to numbers to use as a mnemonic device.
And a competitor of Vanguard's, Fidelity Investments, is using a visual mnemonic device, a green line, in a campaign by Arnold Worldwide in Boston, part of Havas, which carries the theme "Turn here".
What they don't use it as is a mnemonic device.
Use an acrostic as a mnemonic device.
Writer recalls a mnemonic device used in his 7th grade history class, which helped pupils recall Cabinet members by seniority of rank.
The national milk ads that use the milk mustache as a mnemonic device are created by Deutsch in New York, part of the Lowe & Partners Worldwide division of the Interpublic Group of Companies.
