Best way to host a blog giveaway

I have a couple blogs, and in an effort to get more Google hits through SEO, I thought I'd try doing a couple giveaways.

At first I just put them on my blog with a post up at the top letting people know that they were there. Even though I get about 40-100 hits on each a day, and have a multitude of subscribers, there were very few comments made.

So next I looked to see where I could post online to let people know. The best, and easiest to use, application that I found was at BigListofGiveaways (this isn't a sponsored post, it's just what I found). I found that my giveaway for something useful (dish cloths) got the response. Something obscure and targeted doesn't get as many people signing up, apparently.

Also, in an effort to get the most comments and hits, I marked that it's an 'easy giveaway- just leave a comment with contact info' since that's what I was after anyway.

Just sharing my findings.