I have been using [StumbleUpon](http://www.stumbleupon.com) for a few weeks and have realized some important considerations that you should take into account when submitting content to the service. While Digg, Netscape, and Reddit are socially driven news and content sites, StumbleUpon succeeds more in delivering content (i.e. media) than it does in serving important news items. The news items that I StumbleUpon are often old and outdated. For example, random stumbling right now served me pages from Feb 25th, 2007, Feb 15th, 2007, and Nov 10, 2003 among some more recent articles. While some opinion pieces transcend time, most news articles become irrelevant after a week or so. What I learned from this, and from my own voting habits on the content that was displayed to me is that photography, videos, humor, and other types non-temporal content generally tends to do better and has more of a chance of creating long-term traffic. This is a significant way in which StumbleUpon differs from other socially driven sites, as it has less to do with timely promotion of important content and more to do with giving interesting and fun content more exposure. For example, just look at the [Wikipedia entry ](http://en.wikipedia.org/wiki/Stumbleupon) on the StumbleUpon,
StumbleUpon is a commercial web discovery service that integrates peer and social networking principles with one-click blogging. The Toolbar system automates the collection, distribution and review of web content within an intuitive social framework, providing users with a browsing experience that resembles "channel-surfing" the web.