Social Media is the best way to ensure instant, and genuine, visitors on your website. But among so many Social Media Marketing websites, I would suggest you to use the following 10 websites. I personally use these websites, and they bring a lot of traffic to my website Nodepages.
1. Twitter - the best Social media communication website.
2. Stumble - the best social bookmarking website
3. Digg - it is not as good as it used to be before, but still very good.
4. Facebook - nice way to bring continuous traffic on your website
5. Traffup.net - Not just bring massive free traffic, but also free twitter followers and retweets.
6. Linked In- Great for niche marketing
7. Reddit - it is not as good as stumble, but sometimes bring amazing traffic.
8. Hubpages - Great way to get continuous traffic and backlinks.
9. Youtube - Create an attractive video of your website and promote it virally (if you are lucky)