Google has pushed some new features to the Google Drive website, making it even easier to ensure that all of your documents are organized. Keeping your cloud files organized has always been an issue (it's easy to just dump and forget), so Google has added a new "move" icon for files that are already in Drive that allows you to quickly move them to a new location. With the Move menu you can pick any current folder or sub-folder in your Drive account, as well as create a new folder into which your file will be moved.
If you're previewing a file, you can select any folder in your Drive to save it to, and it will move right there. Finally, should you find things to be really cluttered, you can drag and drop to make things even faster. These changes are available on the web right now, so get to organizing!
Source: Google Drive Blog