On occasion I like to do contests. There are not big giveaways, but I do like giving things to the people that support this site by reading it.
My problem with contests is figuring out how to do them. I find plugins to select winners break or slow down the site. Lately I do the contests by selecting winners based upon thumbs up on the youtube video comments. That way, I am not selecting the winner, the community is.
It is important to me that website is useful to the readers and you feel welcomed and valued. I do what I do because I care about it and I hope that comes through in my writing.