Social bookmarking isn't some magic bullet, like much of IM you get as much out as you up in. Try out Digg before anything else, spend 10 minutes a day for a month adding friends and digging their stuff. I think you'll find that after a while, when you submit a story every couple of days it will get at least 20 digg's no matter what it is.

Twitter is really performing in a wonder way so that it can be utilized by viewers like me.

To my own SEO knowledge, I do not recall that twitter has the ability to generate backlinks.
Links on twitter are no-follow.

twitter does not generate backlinks, it generates traffic

It is good option for generating traffic on the blog.

The Twitter is best social bookmarking site they get the more traffic your website...

To get traffic from Twitter, you should have lot of followers there..

For getting lots of followers on twitter it is essential first, to follow so that, they will follow you back. Like this you will increase the no. of followers and it will result in good traffic and good source of branding your business.

I have twitter id . his 1000 followers , any one want perch-age can send pm