Has this ever happened to you? In your haste to save, say, a Word document, you give it the wrong name or introduce a typo in the filename. Happens to me more often than I care to admit. (Shoot, I just admitted.)
Obviously you can open up Windows Explorer, find your file, and rename it the old-fashioned way. But there are two quicker, easier options, both of which let you stay inside the program you're already using:
1. Click File, Save As, and save the document again using the correct name. You'll now have a second copy of the document, but that's no big deal--you can always delete the first one later.
2. Close the document. Then click File, Open, navigate to the incorrectly named file, right-click it, and choose Rename. Type in your new name, press Enter, and you're done. You can then open the file using its corrected name.
The moral of the story: You can perform basic file-management operations inside the Open and even Save dialogs for many programs. Give it a try!