Joining Blog TopSites are one of the ways to bring traffic(Free!) to your blog. It takes just a bit of effort on your part to get going. Generally, you will need to register with the site and get your blog approved. Once approved you get your personalized code block that you need to add to your blog. This code will help visitors of your blog to vote for your blog. The more votes you get, the higher you climb on the list and are more likely to get more visitors.
Here's a small list of Blog Topsites where you can register your blog :
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