How do those two very important and valuable elements combine??
Like this...

This gentleman runs a Science Fiction and Fantasy bookstore in New Haven Connecticut, and, even though I have his card at home, and I spoke to him and his partner/wife/sister/girlfriend for some time, I can't remember his name to save my life.
However, as he and I progressed from Science Fiction to family (a natural path, I think), he started telling me about his little brother (who got him into all sorts of bully-related trouble) and his sister, to whom he taught self defense.
Then, he taught me those same moves, as witnessed by Sandra McDonald and her trusty, truth-telling camera.
It was fun. I learned something. And, I definitely ran through the set of moves in my head just days later when I was walking home by myself after dark. So, a big thank you to the lovely gentleman from New Haven--I am now a better prepared woman of the world, and I can sally forth armed with his useful moves and my various skull-cracking fantasy tomes.
This is why we go to Readercon.