What marketing gimmicks have you tried and worked/didn't work? Ones I can think of are funny viral signatures, stories or videos that can pull in thousands of visitors on their own. Freebies and giveaways with a twist sometimes work. Do you have any other marketing gimmicks that have pulled in large numbers of visitors in a matter of hours or days?
This site has got some interesting examples of ways to promote your site offline blogstorm.co.uk/5-killer-ways-to-promote-your-website-offline/