Is your blog new and you want to build quality permanent backlinks? Every new site needs to generate permanent quality backlinks so that, website can generate free traffic from major search engines such as - Google, Yahoo, Bing, Ask etc. If you have written some useful articles on your blog, you must share your articles' urls in popular do follow social bookmarking websites because when you submit your articles' urls in popular do follow social bookmarking websites, you get two main benefits which are Traffic and Permanent backlinks. When your site get quality permanent backlinks from popular high ranking websites, your site's search engine ranking increases automatically.

I this article, I am going to tell you 30 do-follow social bookmarking sites. You should submit your each article's link on these social bookmarking sites.
Note- Do not try to submit your all articles' links in these 30 sites in one day. You should not submit more than 3 articles in a day. For example, if you submit 3 articles to 30 do follow social bookmarking sites per day, then your monthly submitted articles would be 90. That means you can build 90x30=2700 quality backlinks in a month without using any paid method.
Okay here is the list of 30 do-follow social bookmarking websites where you should bookmark your articles.
1. Reddit
2. Digg ( Not do-follow but useful in SEO & driving traffic )
3. Stumbleupon ( Not do-follow but useful to drive traffic)
4. Delicious ( Not Do-follow but useful to improve search engine ranking)
5. Technorati
6. Folkd
7. Chime
8. Current
9. Dzone
10. Buddymarks
11. Slashdot
12. Shetoldme ( Also share Adsense revenue )
13. Bizsugar
14. Clipmarks
15. Social-Bookmarking
16. Tagza
17. Blinklist
18. Mylinkvault
19. Kojaxx
20. Bookmarkall
21. Bookmax
22. Humsurfer
23. Rambhai
24. Designfloat
25. Gaddiposh
26. Yapod
27. Blogmarks
28. Givealink
29. Cloudytags
30. Newsvine ( Also allows users to make money by submitting articles)
I think, if you share your articles's link on these 30 social bookmarking websites, your article will get high search engine ranking and your site will receive some free traffic from these social bookmarking sites. These sites are very useful and if your article is shared by more than one user, you can get more traffic from some of these social bookmarking sites easily.