Dino_M - 3:52 pm on Nov 4, 2002 (gmt 0)

Tube advert work the best for offline advertising of websites. People have time to write the URL down.

For other types of adds use any keywords
(that you have number 1 ranking for in google) very prominantly. People tend to forget www.red_widget.uk.com but may well see the ad and then go to google and type in red widgets! Make sure not to advertise for a competitor by mistake!