One of the best known ways for webmasters to achieve high rankings in search engines and for web site owners, who are looking for more targeted traffic to their website, is to sign up as authors in article directories websites and write about topics they are familiar with.
Content is king, and Google loves content. Google likes good original content, not the type that was scratched off from other website, or Wiki and re-written again.
There are many free articles directories on the internet, where you can simply register as an author and submit your articles- free of charge.
Some of the articles directories will let you add links to website or link specific keywords inside the text which will aid you in achieving high search engine rankings for those related keywords.
Search Engines value links from related content pages than simply links from unrelated content pages, so you know that links you get from article directories are often worth more then other links from link exchange programs etc.