You should follow me on Twitter JUL 15 2009
Using a link to his Twitter account from his blog, Dustin Curtis tested the effect of language on clickthrough rates.
Making the phrase more direct and personal by adding the words "you should" increased the clickthrough rate by 38% to 10.09%.
Curtis started out with "I'm on twitter" and eventually increased the clickthrough rate by more than double by changing the wording to "You should follow me on Twitter here." (And Jesus, gorgeous site design too.)