Sometimes you are looking for a specific file, but what was it called again? And the preview is also too small to find the right image or text...
Leopard users (OSX 10.5) no longer have to open countless files to find the right one. There is "Quicklook" (or "Overview") for this. Simply select files in the Finder and press the space bar, then the file will be displayed full screen. Works with almost any file type (images, text files, PDFs, movies, Keynote presentations as well as Microsoft Word and Excel files).
Have fun!
