There are two schools of thought on using Google Analytics: one is don't do it because it feeds Google information about your website that they will use against you, like bounce rate, source, etc. The other line of thinking is Google already knows what you had for breakfast this morning as well as all of the above information. I subscribe to the second school of thought and just roll with it. Google Analytics and Google Webmaster are excellent tools. I used to use Get Clicky as a WP plugin for detailed tracking. Good luck.