I've already made up my mind that if this happens to me (and it might, I'm not quite sure) I am just going to shave my head completely.
I feel like, while a lot of people might argue that a full head of hair is better than a shaved head (I think I would agree) I firmly believe that a shaved head is worlds better than a half a head of hair.
You can still look tough or manly or professional with a shaved head. But you just really can't with a comb-over or something.
Now if you are just having a receding hair line, then maybe you can just wear it like this: