Monitoring Long Tail Search

What are some ways you monitor any increases or decreases in long tail search terms? Don't know if you guys have better methods than just "my google/bing/yahoo referrals increases"

I check from my counter the difference words sending me traffic. If it increased %30-40 suddenly i know it. Because mysite is big it's for me very apperant.

I observed long tail search increases at the same times (like every 2 months) google update it's backlink index. I check link: anysitename .com and i follow 3 more site to be sure. When the backlinks updated i check then alexa ranks to be sure there become an update. When i see both are positive. I check then my counter... Somehow i dont use google analytics. I heard it slower the web site. Sınce then i no used. But it can much easy tell you the picture.

There's no way to monitor the whole site globally.... you have to pick a thread that you want to rank or are ranking for in search engines, and want to see what is working.

In analytics, go to :
traffic sources - keywords -

select landing page for the first metric
and keywords for the second metric.

enter your thread part in the filter at the bottom of the table, ie
/cod-black-ops-500849/
is what i monitored today with the release and all...

I did horrible :( lol but you can see the various long tail keywords of how they found me from the search engines.