Free Places to Promote Your Website Online

Social Media Bookmarking

Sites that help readers to bookmark favorite sites, links and news articles are a great way to spread information about your latest blog post and gain quality backlinks.
Del.icio.us
StumbleUpon
Digg
Reddit
Pinterest

Online Directories

Submitting your website to popular online directories can help you gain more visibility through targeted searches and increase your website search engine ranking.
Google Local
Yahoo Local
Bing Business Portal
DMOZ
Merchant Circle

Article Marketing

Writing an article specific for your niche interest is a good way to generate notoriety both for yourself and your business, product and website.
EzineArticles
Hub Pages
Go Articles
Article Dashboard
Business Know-How 

Press Releases

If you recently introduced a new product or service, writing and submitting a free press release can help generate a bit of buzz about it. In addition, if your press release has links back to your website, it can be an excellent source of search engine juice.
PRLog
Free Press Release
24-7 PressRelease
1888PressRelease
PR-Inside

Social Media Marketing

This is the process of achieving and maintaining traffic for a website, or attention through various social medias, such as Facebook and Twitter by developing content that will engage visitors to share it on their own social media page or network.

If you have a Facebook account, you might notice various pages that have been ‘shared’ by your friends or family. Next time you see a link shared by someone you know, take note of how many people have ‘shared’ this particular link.