Make sure you are using Internet Explorer 8
Install the Free Spotify Search Accelerator for IE8
Use it for all your Music Listening Pleasure
Select some text on a web page (e.g. artist, track or album name)
IE 8 AddOn marked with Blue Arrow
You will then see the Accelerator Icon (The Blue and White Square Arrow marked in the picture).
Click on it to get Spotify preview Search Popup and click the green search link.
Spotify Search AddOn pops up
Thats it - Listen at your pleasure in Spotify
This last step is my favourite part :)
PS. I am in not associated with Spotify. This AddOn Tool is a Free Contribution to the Spotify Community. Please do enjoy and be nice :)