[Claymores]

Cold-calls should be top of everyone's list. Especially when you have an unlisted phone number and have registered with the Telephone Preferences body not to receive them (means someone else has sold them your phone number from a database)

When I'm on-the-ball, I tell the sales rep. I'm registered with telephone preferences so his company is breaking the law with the call, ask for his full name, designation, company address. They usually hang-up before me