Social Networking sites is best ways to gain traffic.

linkcollider.com

I think its doing manual submissions, there is not definite website as long as they have good page rank.

there are many such firms

digg, delicious, reditt are the best sites for gaining traffic.

Facebook is good.

firstly have good website content and then build backlinks!

The fact is you can't afford not to be on social media nowadays. More and more social is going to be an important part of SEO, so better start building your profiles now.

I understand that there is no website that can guaranteed you in gaining traffic unless you have rich content and proper search engine optimization

Social sites are best for get the traffic fast. Facebook and Twitter both are best for the website optimization. Fast traffic come on the website with the daily posts.

Always and Always it's Facebook the first large website all over the world, you could gain more than 100,000 visitors daily from it only .

whats the bestway to use facebook to drive traffic

High increase until unless you understand the algorithm or that site and consistently work on that to drive to traffic your site. Before you start your working on any site just remember check the Alexa, PR and domain authority of that site.

very great thank you

Reddit can get you a lot of traffic that even can overburden your server if you share a interesting post there.