If you start using Google docs a lot, you may want to organize your documents into different folders.
To start a new Folder, go to "New" and choose "Folder."
You can now name this folder anything you want. To add a document to a folder, click on the folder icon to the right of your document name, and choose the folder to which you would like to add the document.
You can color code your collections to make them easier to tell apart--all of the documents in each collection will take on the color of their collection.
If you just want to change one of the last few edits you have made, you can use the "Undo" button just as you would with any other word processing program. Click on the undo arrow from the Google docs toolbar, or click "Edit" and "Undo" to reverse the last few changes you have made.
While you are working on your Google doc, you may decide that you do not like the changes you made. Instead of having to rely solely on the "Undo" button, Google docs lets you revert back to any of the previous versions of your document.
To see the revision history for a given document, go to "File" then click on "Version history."
Now you are able to see the complete history of your document. You can make any of the previous versions of your document the new, current version of your document with a click. If you change your mind, you can restore your document back to its previous version by following the same set of steps.