I have optimized my onsite seo very well and every page now has at least a 2.5 keyword density with a 92%. I have have about 1200 backlinks pointing to my site, but I am stuck in the serps since the pages I added I have about 300 now but they are all pagerank 0 and stuck on the bottom of page 1 or page 2. Are these not going to move past the guys with page rank 3's and 4's? How can I boost my page rank? Any tips or tricks?