When your website is affected by Google Penguin updates, it is more likely that you are using black hat seo techniques. Refrain from using tricks in link building and doing spammy content. This is a wake up call for you to get out of the dark and take off the black hat. Step up into the light and cover your site with white. It is the only way for you to recover easily when hit by Google Penguin.
Avoid Black Hat SEO Technique, do white hat SEO, remove Spam pages and spam links, do guest posting, social bookmarking, forum posting, update content regularly, use keywords properly, get authoritative, reliable and reputable inbound links etc.
First of all understand the objective of penguin, Is it really your site affected by penguin? there may be more reason like any on- page mistake, while penguin targets web spam(link-building). If you think your site is affected by penguin do following things:-
Check your back links and always try to create contextual back links.
Don't concentrate only creating do- follows.
Try also naked url back links.
Best of luck..