I want to promote my blog via social bookmarking sites. I am planning on doing this manually so I don't have time to submit each blog post to hundreds of sites. Can anyone advise to which sites I should submit each blog post?
If you promote your blog in theme related social media websites with good PR then you will get good result on your blog.
Try to claim your blog on technorati, also submit to digg, stumbleupon, reddit, propeller, mixx... these are my trusted Social Media sites that can generate traffic only if used wisely.