It is important to know how to save the documents you are working with. Frequently saving your documents helps to keep you from losing your work, and using Save As allows you to edit a document while leaving the original copy unchanged.
You may find that the default page layout settings in Word are not sufficient for the document you wish to create, in which case you will want to modify those settings. For example, if you are printing on a different paper size, you'll want to change the document page size to match the paper. In addition, you may want to change the page formatting depending on the type of document you are creating.