When I was at School if you misbehaved or didn't hand in homework on time invariably the punishment handed out was to write out a sentence or phrase multiple times as Bart Simpson is shown doing on the opening titles of The Simpsons.
This gave me the idea of building a simple website that could do all of the hard work for me where data is input, checked to see that it meets the requirements and is then output to be printed or copied.
Little did I know that this silly little web page would generate around 300 to 500 hits per day. As a basic concept this proves that by offering something for free you can generate traffic to your website which at a later date can be modified to produce either a revenue stream or increase in web traffic.