Excellent question! Analytics can indeed help your business in so many ways. It can tell you, you are headed in the wrong direction or the right direction. The mixture of Google analytics and web master tools is very powerful.
A few things to look at......
1)
Keywords of course. I always find a new search term by checking out my keywords. You will be amazed, no matter how much homework you do there is always a keyword or keywords that you would have never thought of. Do your research and you can optimize your site better for those if they are worthy.
2)
Location is important. Find where you site visitors are when they find your site. You may find trends that can be used to your advantage.
3)
Bounce Rate is extremely important. Why? Because rumor has it google takes the bounce rate into consideration. I am sure someone will argue that but I don't think anyone has hard proof either way. I have a site that is 5% and I have sites that are 56%. Bounce rate will be when someone lands on your site and leaves. They did not spend time on the site nor did they visit additional pages after landing on your landing page. Thats why it's important to have your homepage as a launching pad. Look at googles home page.....who is going to spend more than a few second there?
4)
Most visited pages are important. I found that if you add call to action on those pages you will convert better. Give your site visitors what they want on that page but also offer additional info. There is a reason people go to that page all the time. Find out why and work on your conversion on that page.
5)
Visitor trending (Visits) This is great because it will explain what I can tell you. Majority of your traffic is Monday through Friday. Your peak hours are 10am to 4pm.
6)
Traffic Source is obviously a good one for many reasons. Knowing where you get your traffic is great. if you get someone from a forum you may want to visit that forum and offer them coupons on parts, service and purchase.
7)
Content by Title is very cool. I suggest checking
this link out. He can do a better job of explaining than I can.
8) Site Overlay is a pretty cool feature that allows you to see how your layout effects click through. This will work well with goals.
9) Goals are important because you can track the success of your goals are. Your conversion etc...
10)
Webmaster tools is a must have! This is great because you can see how many links each page has, what keywords you rank for and how you rank, crawl errors, and meta,title and more suggestions.
There is an easy top ten for you. Hope this helped!
Didn't check spelling was in hurry! sorry!