After one year (daily 2 hour) work, my website gets good traffic from Google search engine. My website gets average 700 unique visitors per day last three month (September, October, and November). But it reduced to average 200 per day on December month. Traffic from Google search engine also reduced to average 50 per day. I am faille to find out exact reason. I am link exchange with lots of website on that time. I will stop the participating forum this three month. Anyone solve my problem.