Big traffic change for top URL problem

hello
i have get this message in google webmaster tools

• “Search results clicks for xxx site have decreased significantly.”

after search all said that it is penguin update


what happened to the site


-visitors drop significantly
-ranking drop


i used in my site on page optimisation like

all original content 100 %
title tage
meta dec
meta keyword
h1
h2
sometimes h3
image with the same title
keyword title in the url


off page optimization


few social bookmarking sites

posts in some forums with the same anchor text

anchor text in signature

use rss feeds


i don't know what is the wrong in my site ?


what can i do to fix this problem ?


sorry for my bad English