The links below are all free to join and use.
In this system you surf for credits and then use the credits to promo your site. Some of the ads are crap but if you look you will find sites that help you promote with sites like Twitter. You can buy credits if you like but I would stick to the free ones until you are sure you are cut out for this.
TRAFFIC SWARM
http://www.trafficswarm.com/go.cgi?1003468
BLUE-SURF
http://www.blue-surf.net/?r=dockman45
TRAFFIC-SPLASH
http://www.traffic-splash.com/index.php?referer=dockman45
TRAFFIC TAXIS
http://www.traffictaxis.com/splash24.php/?rid=14121
