Good methods of promotion

Python

Adwords, link exhanges, paid advertising etc... I know of the most common types of advertising but are there any other methods which work?

For example does paying for targeted traffic work? And any other possibilities.

kink

writing your web address on a car or bumper sticker or business card or sending out those senseless post cards real stuff works

mate_pl

submiting site to directories? at least you'll get higher pagerank and some traffic will come too... one of the opinions...