[header] How to run a sweepstakes [title] Have the infrastructure to support it. [step] You will need to have a server that can handle the load. The world is full of people who want something for nothing and a lot of those people invest a lot of time in it! Infrastructure would be : [substeps] Server mail list support database support (for the information received when they fill out entries ) [title] Do some research into various organizations that do data collection. 
[step] Learning, and utilizing, the demographics is one of the many uses of data received in a sweepstakes. Be sure the one you get will work for you.