Yesterday I was searching about Book Marking and Directory Submission there was written as
"If you're submitting your website to hundreds of Internet directories that will never send you a single visitor, you don't need to bother. These links won't help your Google rankings.
If a directory sends your website visitors, it's worth getting the link. You can ignore other directories."
So guys Stop submitting Book marking and Directory Submission on low quality sites. Try to find high Quality book marking and Directory submission sites.