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Ymmv but I got a good grip on gimmicks from The Hidden Persuaders by Vance Packard Also I can't emphasize this enough INSIDE SECRETS OF SELLING (FIND A NEED A

by Fundlab 11y ago

Ymmv but I got a good grip on gimmicks from The Hidden Persuaders by Vance Packard Also I can't emphasize this enough INSIDE SECRETS OF SELLING (FIND A NEED AND FILL IT) https://archive.org/details/insidesecretsofs00ward https://archive.org/details/insidesecretsofs00ward