If you are selling stuff or promoting your websites, try posting on classifieds website. It will give you terrific outcome with no cost ( mostly). Almost of classifieds websites offer free service, so you can promote your stuff or websites or everything else to people who are searching for interesting stuffs. You should post on high traffic classifieds website like Craigslist or specific website like www.tourlism.com if you are promoting niche products. Below are list of cools classifieds site.
1. Craigslist (excellent choice if you are in US or Canada)
2. The Sun Classifieds (best of all for UK)
3.Tourlism.com (Excellent site for travel related stuff)
4. Craigslist UK
6. Kijiji - classifieds version of ebay
7.Gumtree - Kijiji in UK market
8.Bakcpage.com - nice alternative for craigslisgt