Finding A Roach

Is there anything worse than finding a roach in your house?  I just hate the feeling you get when you see one in the house for the firs time.  I remember walking into my apartment in Houston, Texas one summer evening to find a gigantic roach just sitting there on the wall in front of the door.  Up until that point, I had really thought that the place was roach free, but my bliss ended right there.  I was able to trap it and release it into the wild, but I never regained my innocence.  What can you do, really?