preblogging

The best way to increase your traffic from Digg.com and StumbleUpon.com is to get more votes. Often you may have a great blog post, and people do visit via these websites. 
By providing a call to action. This call to action will greatly improve the number of positive votes you will get, and hence in the end you will get more traffic.
<h4>What is new in this version ?</h4>
In Version 1.3, there is the option to specify a your own site. And you can send these visitors a certain message also. Also there is a new test mode !

Increase Sociability

Increase the traffic from social media websites by reminding visitors to vote

Michael Henke

Insert SEO friendly/neutral links to social networks and bookmarking services. This plugin is proudly provided by <a href="http://www.all-things-seo.com" rel="nofollow ugc">all-things-seo.com</a>.
If you don’t know yet, find out what a <a href="http://www.all-things-seo.com/seo/seo-friendly-social-links/" rel="nofollow ugc">SEO friendly link</a> is. These Links can be inserted automatically above or below each post or manually (e.g. in the theme).
The plugin ships with support for Twitter, Facebook, digg, delicious, buzz, reddit, StumbleUpon, …extend the list by customizing your own services

SEO Friendly Social Links

Insert SEO friendly/neutral links to social networks and bookmarking services.

Increase Sociability vs SEO Friendly Social Links