If you need no more than one sheet, click the New Document button in the
Labels dialog. This will give you a full sheet of labels. They are set up as
a table, so make sure you have table gridlines displayed (Table | Show
Gridlines) so that you can see the label boundaries. If you need to create
more than one sheet, then you should use a mail merge. If you have names and
addresses in your Outlook Contacts or Address Book, you can use that as a
data source; otherwise you can create a data source. See these articles: