I ranked in the first page of G within two weeks of starting my SEO for a semi-competitive term (about 725,000 competing pages). My whole ranking came from a handful of backlinks on sites with PR 5thru PR 9. So just get on as many of those as you can (not all at once though) and you're golden.
Aside from doing the social bookmarking, try to participate in article submissions, directory submissions, and links exchange.. Take note: Submit your URL to relevant sites to get good back links.
Try getting good/quality back links.. Good/quality back links means submitting your URL to relevant sources.. But be sure your keywords coincide with the content.
If you are worried about SE traffic you must understand SEO..Onpage with meta title/descrip/tags as well as offpage: relevant links on directories, articles, press releases, social bookmarking.