Questions from a Newbie

I came into the office (aka Amore Coffee) this morning and discovered a lovely email from a young woman who is considering writing her first novel. She sent me a list of twenty-two questions about writing craft and publication, and rather than send back an email large enough to crash a server, I thought I'd answer them one by one here:

1. How do you develop your characters? Are they people you know?

I think that if you want write believable characters it helps to be a kind of Sherlock Holmes i...