If you use Internet Explorer or Firefox Browser then you cant be without this functionality.
We all use Google the whole time, but isn't it frustrating to look for something and have to constantly click on broken links in search results OR to open results that you've seen before.
Found a little utility that shows you screen shots of the search results WITHIN the google results page! Works like a bomb.
You'd think it might be slower than normal search results, but i haven't seen a difference in performance.
Try it, you wont be able to go without it once you have.
Download the application from;
http://ackroyd.de/googlepreview-ie/ for Internet Explorer Browser
http://ackroyd.de/googlepreview/ for Firefox users.