Anything you can do to make it awkward to get at. As already stated locks won't stop a thief just slow him down, so the more the better and the more awkwardly placed the better. The again, you don't want to have to lug 50 lbs of locks around all day. Even my single forgetaboutit can be felt within a short time.

Now that I think about it raise it up and make the lock difficult to conceal with a grinder or any cutting tools for that matter. Also, as close to a busy doorway is also good, since he never knows when the person coming out would be the owner.