A common question writers are asked is, "So, where do your story ideas come from?" Stephen King, on his official Web site, answered the question in this way: "I get my ideas from everywhere. But what all of my ideas boil down to is seeing maybe one thing, but in a lot of cases it's seeing two things and having them come together in some new and interesting way, and then adding the question 'What if?' 'What if' is always the key question."
I totally agree. Ideas come winging at me like missiles from anywhere and everywhere--overheard snippets of conversations, newspaper items, TV commercials, even graffiti on a city wall! There are so many ideas that I couldn't possibly write all the stories that occur to me. I have notes everywhere, jotted in moments of hot inspiration. Writer's block? What's that? The trick is just being open to whatever occurs to you, and then asking that magic question, What if?