Google seems ignoring paid links as well as articles submissions which are all over in tons as it spams their indexes - junk links/junk article contents. As Google algo is based on links/votes only, so what shall be SEOs next strategy then to get links and improve in SERPs?
That's a loaded question. What's next? ...the same stuff that has always worked - provide quality information. Social media outlets are the way to go. Viral campaigns. Write an article that gets on the front page of Digg and you're good to go with links. Getting an article on the front page can result in hundreds of links...for free.
i believe http://forums.digitalpoint.com/showthread.php?t=224828 is a good resource for the link building .