How do I set up an online contest, (easy voting contest) for like Facebook or something?

first off read the contest you are in rules to make sure promoting to get votes are allowed some places disallow running a contest to get votes. So I would read the rules to make sure you don't get dq'ed There is a site called www.contestmob.com/blog that has even more information that is by contesters for contesters. So I would check that out. If you want to run a contest and its allowed you could maybe have the member take a screen shot of them voteing and email it to a email address with there name. So you can make sure they voted. and then keep track of every person that voted. I''m sure htere are other ways also :) good luck to you in your contest!