That's a pretty broad question. Could you be more specific? Do you mean on the web site itself, or in other venues? Forums, perhaps?
I have an automotive web site I've been trying to promote and get the word out on. I have a contest giving away like a grand in prizes. I have tryed google adwords, email marketing, paid ads and nothing so far has worked.
yeah you can do so in the digitalpoint underground or general chat area i think. as long as your posts do not look like spam and the contests are genuine i dont think ull have a problem. Good luck with the contests
find all the contest blogs on the internet, and email them and let them know about your contest, and ask them to do a post on it!