I have these tags on my blog. The best ones I have seen so far in bound clicks from viewers are Digg and Delicious. When I post something in my blog I go and "dig" or syndicate the post myself first and then if it catches on I usually see some good traffic, which can then lead to links from other blogs talking about my blog. Simple huh?
One of the best responses I have seen thus far is that
Diet Coke and Mentos video that went around. I posted a brief entry on my blog and then sent it out and it caught one well.