Its very important to have the share buttons of the popular networks available to your readers in order to remind them to help you promote your content.  This is not a difficult task and you can always use services such as http://www.addthis.com or http://wibiya.conduit.com/ or http://www.po.st which offer a great service.  One would choose these services for the ease of use and statistics they provide.  On the other hand these services are not so easily customizable (not to the level I want them to) and they tend to be heavy on the pages load ...

Anyway for people like my that want to customize every aspect of their site here is a quick copy paste code that you can drop to your pages in order to get the buttons for  facebook like and send, tweet button, google plus and linkedin share

If you need to customize your buttons go to the following urls

http://developers.facebook.com/docs/reference/plugins/like/
http://twitter.com/about/resources/tweetbutton
http://www.linkedin.com/publishers
http://www.google.com/webmasters/+1/button/