If you've ever wanted to combine the contents of two directories, you don't have to copy/paste them together—Windows 7 or Vista will let you merge them easily.
You probably already know that Windows will prompt you to merge two folders when you copy a folder with the same name into the same location as another folder—but you can simply rename one folder to the same name as the other to trigger the merge process. You'll be prompted to replace any files or subdirectories that have the same name, but at the end you'll have a single merged folder.
It's one of those little tips that's good to know just in case you ever need to use it, like the new folder shortcut key in Windows 7 or restarting Windows Explorer the safe way with a hidden trick. Tired of Windows Explorer? Try out one of the best alternative file managers, or power up Windows Explorer with free add-ons.
Got any great tricks for dealing with files and folders? Share them in the comments.