"Half the money I spend on advertising
is wasted, and the problem is I do not
know which half".
Lord Leverhulme 1851-1925,
British founder of Unilever
and philanthropist
Stop doing anything you can’t measure!
All marketing can be trackable, right down to a specific ad or marketing piece.
You can use reference numbers and promotional codes to monitor your response rates.
..and remember to ask people who contact you for the first time where they heard about you.