This is a good question, as this is advertising that you have to keep changing very often and it is because there are so many people out there with different interests and visions, etc. Now, this has worked well in the last month:
Worried about the economy and your salary cheque, change it and Invest in your future -NOW, http://www.sfi4.com/xxxxxxxx/first
A long term 'one-liner' does not exist...... it changes, from day to day........