Conversion analysis for phrases with three or more words:
Most of Sites promoting focus on gold expressions. These expressions usually have one or two words, take for example the golden phrase "auto insurance" or for example "mortgage". These expressions bring the most traffic and almost always the most conversions. But what a crazy competition they have...
To enter the Top 10 places and stick to the first places is a challenge that can take a lot of time, money, links, good content and a lot of nerves!
So instead of or in addition to our investment in gold expressions here some tip that will give your conversions push...
Enter the words report that found at 'Traffic Sources' area and click on none paid. Now the report shows only organic visits. Scroll to the bottom of the screen, put at the filter in the following text:

(\ S | \ +).*( \ s | \ +) .*

Now click Go
These strange signs help us look for patterns within text and they more familiar under the shortcut name Regex (Regular Expressions). However, by using this line, you have asked from results to see search phrases containing three or more words. No More Gold Expressions and say welcome to your long tail phrases.
Do sort by the goals and metrics that definition and you'll see what phrases bring you conversions. From here, you know what to do.
Now take the successful words you found, execute them in your positions, find the potential and produce a new page or maybe use an existing page. Give 2-3 good links, change the Description to support you, maybe a new title also and you at first place pick conversion easily.

Good luck