If a small, 4-5 page site, make a prototype page with all your columns, headers, footers, menus, etc... and go to File > SaveAs index.html, and then File > SaveAs > page1.html, and then File > SaveAs page2.html, etc...
Or you can save your prototype page as a Dreamweaver Template (.dwt file). Add editable regions for stuff that will change from page to page. Everything outside editable regions is common to all site pages. Then use your Template to spawn site pages. File > New > Page from Template, index.html, page1.html, page2.html, etc.... DW Templates are nice site management tool. But before you use them, read all you can about them in F1 Help as they can be a little tricky to master.
Last but not least, look at Server-Side Includes. They're a huge time saving feature. I use them on every site I build.