Originally Posted by Sly

If you are really into it, get a tool like this: RankTrackr | Rank tracker for SEO professionals

This is the one that I use, but there are a few on the market. I use it daily. For this particular model, you add your URL and also which engine you want to be searching. Then you can add many keywords for your URL. It will track a variety of metrics for you.

This is not something that you should be checking manually for a variety of reasons. It's not accurate, it's a waste of time, etc. etc.