Writing great content is indeed the best method to make your blog popular. It would be even greater if you could allow people to easily share your posts over their favorite social media.
Sharing is Sexy is one of the easiest and coolest way to bookmark your posts. I just installed it in my blog, thought it might be interesting to add it to your blog too.
Follow this link for the full tutorial for blogspot users.
Wordpress users its actually a built-in plug-in download it here.
I discovered it from this post