How to make a rather huge number of visitors to your website

It’s been for a long time that I’m trying to help a website grow in search engines ranking but still frustrated. I have used so many social bookmarking services such as Twitter for twitting news, Youtube for uploading company’s films in order to be shown when googled in movie results of key-word-related searches in Google. Also I’ve used Flickr for photo sharing, Google reader for feed sharing and at last I’ve publicized the feeds of all above in Friendfeed. However, I’ve gained no google page rank and the utmost google search result for the most related keywords has been 8th page, every page 10 results. 

I’m thinking of google AdWords, but not sure if the graphic could help make much more out of the plenty of the visitors and persuade them purchase the products, as the result. Since the company is a manufacturer of cup printing machinery, I’ve resorted to alibaba, the most powerful website specifically trying to join the buyers and the sellers in this regard; I’m not a paid member, but since the time I registered for free membership, I’ve received some inquiries about the products advertised free. I decided to persuade the boss to become a Premium member and pay about 600 bucks to make our sales better. I think I’m doing fine and he is so enthusiastic to do so. 

Also I’ve tried so many other free websites like alibaba, but think since alibaba is co-operating with Yahoo! and Yahoo! has bought about  a half of its share, it would work better.

I’m writing these, because I still hope I can receive my readers’ advice and get it done much better. Would you please  kindly do me some big favors and generously let me know what else I should do for what I told?