Yesterday I installed Google's new search tool: Google Desktop (http://desktop.google.com/)
This thing is great! I have to admit that I am an information pack-rat and I am constantly saving files, documents, scanned papers, images I find on the internet, pictures from my camera, news articles and even things from this website. You name it I am probably hording it.
The problem is that it is getting very difficult for me to find things that I know I have. In steps Google Desktop. It is basically the Google search engine, only it runs on your local machine indexing everything you have. You can then go to a Google Desktop Search screen and do a search just like you would on the internet and it will show you everything on your system that fits the search!