Go into your analytics account, select your profile of choice, and drill down to your organic traffic via Traffic Sources > Sources > Search > Organic

For this particular audit we are going to look at just the top 500 traffic driving keywords over a 30 day period, for deeper analysis into performance over longer periods of time simply adjust the time period within analytics.

Go down to the bottom right-corner of the screen and set it to show rows = 500

We will also want to take a look at the URL's that are acquiring these visitors, so click the 'Secondary dimension' button and under Traffic Sources, click 'Landing Page'

Now export to csv or excel (xlsx)