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For over two decades, David Wethey has been helping some of the world's largest companies in an important area of decision making - the selection of their advertising agencies and marketing partners. He's had a unique insight into hundreds of companies, first as a successful ad man and more recently running his own consultancy practice Agency Assessments International. David is a frequent lecturer and writer on marketing and advertising issues and you can find his blog at www.makingbetterdecisionsbetter.co.uk, or follow his frequent tweets @davidwethey.