The Best Strategies after Penguin Update is
1) Don't over Optimize your website
2) Focus on Quality, not Quantity
3) Analysis your Back links Data
4) Avoid Keyword Stuffing
5) Avoid Low Quality and Low Relevance Links
6) Appropriate Anchor Text
7) Try to Remove Side wide Links
8) Guest Post from High Authority Websites
"Do Less Work" and "Good Quality" make it more natural to search engines.