Link building is very effective in SEO. it is the best way to drive traffic for your website. some effective link building techniques are:
-Forum posting
-Blog commending
-Social bookmarking
-web 2.0
-Directory submission
-Article submission
-Link wheel
-Video submission

Google Analytics gives you a huge advantage because monitoring and statistics it provides. You can identify customer demographics so you can optimize your online marketing and reorganize your pages to target your prospects hot buttons. Google analytic is best tool to track your website traffic.