Promote Your Business Online For Free:

Free Online Classifieds:
All of the websites listed are free to join.

Backpage.com
Estia.com
Schnew.com
US FreeAds.com
oodle.com
classifieds.yahoo.com
inetgiant.com
webclassifieds.us
finditclassifieds.com
classifiedsforfree.com
www.adpost.com
buysellcommunity.com
gosasa.com/
smartstash.com
kijiji.com
GoogleBase

Blogs & Articles:
(place your ad free in an article you write)
Wordpress.com  here is an example: http://imageads257.wordpress.com

Squidoo.com
Blogger.com
Ezinearticles.com
Searchwarp.com
Blogspot.com
PRweb.com
Articlecity.com
GoArticles.com

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Forums:
Join forums related to your product or service. Do a search in Google with your keyword followed by "forum" once you are a member, you can post info about your site and Google will link to it as long as you use relevant keywords. Be sure not to post only your web address by itself, many forums look at this as spam. Instead, get involved with the ongoing conversations and casually mention your website or business.

"Tagging" your Image Ad
You can upload your image to photo sites,
many allow you to add "tags" to make your image searchable. These tags are quick and easy to enter and they are actually the keywords to help people find your website when they do an image search:

PhotoBucket
Imageshack
FlickR

Social Bookmarking: Just go to your site, copy the URL and then go to these sites and add your own bookmark. This is effective for traffic in the latest Internet marketing techniques. Get even better results by bookmarking your blogs that talk about and link to your website.
Examples:
Stumbleupon.com
Digg.com
Technorati.com