I have a website for which I am targeting 4 keywords and they all rank on 2nd page of Google for my website. I used to do basic SEO activities like SBM, classifieds, business listing, blog commenting, forum posting, directory submission, blog promotion etc... So I would like to know that what extra efforts I need to put in order to bring them up in 1st page of Google.
Have you read the SEO FAQ? There's lots of useful tips in there as well as in past discussions we've had in this forum.