Google is a rampaging bull and the constant updates to serp results shows the blood bath is not over yet. I have seen various postings here and at other forums promising to help you recover from panda or penguin updates. Maybe my observations will help you save your hard earned money:
1 - The more backlinks you create, the more rankings you lose. Forget using generic anchor test as the recent Google update can now catch the trend and your website would be penalized.
2 - Public blog networks will now die much quicker because of the huge footprints.
3 - Web 2.0 backlinks are slowly losing ranking power and by the next few months most would be worthless.
4 - Article directories cannot be relied upon as backlink sources. Google mostly would ignore the links, indexed or not.
Now if all the above links would hurt your site, what can you do to rank your site with all the constant updates. Presently, NOTHING! Some steps you can take to survive this slaughter:
1- Create more unique contents using LSI keywords and update your website more often
2- Learn content curation techniques and implement them on your website. Do not just copy and paste, but re-write the snippets in your own words and give credit to the original source.
3- Create videos and distribute them to about 5 to 10 video hosting sites including youtube. Be sure to vary your description on all the video sites.
4 - Bookmarking is good, but buying bookmarking services would give you no added benefits. You need to go back to the original intent of bookmarking and you would get some positive results. But, simply blasting your site to hundreds of bookmarking sites would get you noticed in a bad way.
Some Observations:
Ignore anyone telling you they have the formula to get your rankings back. Truth be told, the Google massacre is ongoing and no one knows the new ranking metrics.
Maybe you should know, indexed backlinks means nothing as Google is now a 24/7 thinking, breathing algorithmic machine. I am sure some of you have noticed how your rankings drop the more backlinks you create.
Eventually, Google would settle down and the new ranking metrics would become clearer. But for now keep your head down, build more contents, create videos and do some normal bookmarking.
Google is determined to de-index millions of websites as a way to clean up the SEO cesspool. Some privileged information cannot be posted here (as Google monitors all top IM forums), but seek out someone on the inside and you would find most of my observations above are deadly accurate.
Also, lookout for massive closing of adsense accounts used on a lot of de-indexed websites. Adsense accounts would become harder to get as the months go by.
Why is Google doing this? That I cannot tell you, but I know adwords spending is growing rapidly and the next quarterly earnings report would surprise many people.