Alot of people use the little orange icon with the arrow in it thats up in the address bar in Safari. Say you searched Google and clicked one of the results. You would click that arrow icon and it would bring you back to the main site that brought you to where you are now. In this case it would bring you back to that Google search.
One thing alot of people dont know, is that there is an option to select a page for snapback. So say that you didnt want to go back to that Google search, but wanted to go a few pages ahead, but behind where you are now obviously. You can go to History>Mark Page For Snapback. There is also a hot-key for it. Just a little tip i thought other Safari users should know!