Vista features a nice little trick for resizing your icons from small to huge while you are browsing files in Explorer or checking out files on your desktop. This can come in very handy since different directories have different viewing requirements. Image folders are going to serve you best if you can clearly see the thumbnails while large directories of miscellaneous files are going to be better with a small icon. The easy way of doing this is as follows:
1. Give the folder or desktop focus.
2. Press the Ctrl key while using your mouse scrollwheel to resize the icons.