I found these strategies working to drive traffic to a website through twitter :

Share relevant content : Content is the key to growing your fan following. As a marketer, you need to deeply understand your audience and should know what they expect. You need to look from their point of view and use your words wisely to capture their attention. Whichever space your audience lives in, offer benefits to them.

Follow And Unfollow those who don’t follow you back : Follow 1000 people everyday and unfollow those who don’t follow you back. As twitter do not allow you to follow more than 1000 people per day if you are new in twitter.But just following 1000 new people everyday from your target audience you can get a good no of visits to your websites and can also grow your network.

Use Direct message Campaigns And Auto Direct messages: Use Auto Direct message and try to write a short message with a link to your website so that it can generate call to action if people were interested in your product and services.
Secondly you can try Direct message campaigns with a link to your website on twitter and can track the performance of your campaign on google analytics.Use audiense tool to schedule a mass Direct message campaign.

Use Hashtags :Twitter Hashtags help create communities of people interested in the same topic. Any user can create it by simply adding to their tweet. It helps brands to get involved in the conversation. You will definitely reach to a wider audience when you use hashtags but all you keep in mind is that the hashtag must be relevant to your posts. Make sure the hashtag makes sense, and start your own hashtag to start your own conversation. If people catch on, your brand awareness goes through the roof and your following will increase tenfold. Ideally, 4 to 5 hashtags are enough for a single post. Do not put more than 6 hashtags in posts.

Run Twitter Contest :Create a contest and attract new followers. Make prerequisite of your contest to follow first. This will organically grow your audience immensely. In fact, personally, I have too followed many of the Twitter profiles that are running giveaways, or contest. Make sure your offers entice people to take part and follow you. Also, keep the Twitter guidelines in mind to ensure you are not breaking the rules.

Here are 4 link submission which you can use to get a lot of visitors for your blog.

1. http://www.easybooksolution.com
2. http://www.linkworld.us
3. http://www.speedfz.com
4. http://www.gowider.com

Thanks for your questions.

There are far different between this two kinds of website.   Social bookmarking website is that kind of website where your  bookmark will spread out only among your friends. You can communicate with each other via this website.  Example of Social Bookmarking website:
https://twitter.com 

But In bookmarking website, your bookmarking will reach all over the world instantly. You cannot make friends and communicate each other.   Here are 4 link submission which you can use to get a lot of visitors for your blog.

http://www.easybooksolution.com
http://www.linkworld.us
http://www.speedfz.com
http://www.gowider.com

Thanks for your questions.