This might be really old to some people, but i recently came upon a pretty useful site, http://www.makeashorterlink.com/

I think it's pretty useful, especially in emails sometimes your urls get cut off and the links don't work properly, if they're too long. Like, a link like http://gamespot.com/gamespot/filters/products/timelines/0,14209,561527,00.html is really long to fit in an email, whereas using that site gives you a nice and short: http://makeashorterlink.com/?V19E21823