From the article: This is a guide on how to find and fix Google's Panda algorithm update, based on our Panda fighting experience at SEOgadget in 2011.
1) The world is not as it once was.
Crap websites trying to masquerade as decent websites are being hunted down and sunk below the quality line.
2) Google owes you nothing.
Tactics to just barely raise your quality enough to recover your rankings are unlikely to pay dividends. You may well find yourself a loser again the next time the quality bar is raised.
3) Google is judging you.
Google is going to continue to raise the quality bar with future updates. When your competitors improve their websites, you will be weakest and in line for the chop at the next quality update.