Thinking Thursday -----> Google Analytics

So, I am thinking.......I look at my Google Analytics every couple of days. Why? You know, I'm really not sure. I guess to see how many visits my Etsy shop, blog and website got. That's about it. Seriously.

So I'm thinking....there's got to be a way I can analyze those results to find out things such as:
---What impact did listing 3 things on a certain day have on amount of visits to my shop.
---What impact did featuring another seller have on my blog impact traffic to the blog.

How can I take what I see on the Analytics screen and use it for further analytics to see what is working and what is not working for my business.

Any suggestions? Websites? Blogs that explain this?