Links from high PR web pages will do best. The total number of outbound links from the same page too matter a lot.
Manually scouring the web for decent PR links and buying what you can afford that gives the greatest exposure.
Google Page rank is based on back links. Back links are Links pointing to your website from another website. The more back links you have the higher your PR will be. Different techniques of applying backlinks. *Forum Posting *Submit to search engine directories. *Using ezine ads (or newsletters). *Creating and publishing articles. *Links from related websites.