Here’s an example, off the top of my head:
She heard something move in her closet.
Just seven words, but already all sorts of questions arise. Who is this unnamed woman or girl? What’s in her closet? Has she heard this noise before? Does the noise make her scared, excited, relieved? You could take this initial sentence in countless different directions, and every one of them is as valid as any other.
Do you like to write crime fiction? If so, could the noise in the closet be a murderer? A victim? A policeman? Or something even more unexpected...?
Crime not your thing? Okay, perhaps this is a horror story or a ghost story, and that thing in the closet is, well, I don’t want to imagine what could be lurking there.
How about something a little less stressful? This is a story for children, perhaps, and they are playing hide and seek. Or it’s a romantic comedy, and the boyfriend has somehow managed to get locked in the closet.
Can’t even dream up that first sentence? Then you’re thinking too hard about it. Look around you for ideas. The first thing I see as I look away from my computer monitor is my radio tuner. So how about:
David had never heard this station on his radio before.
What’s going on here? Perhaps aliens trying to communicate? Or what if David is the only person who is capable of hearing this station. Why would that be?
What else can I see? Lots of books (of course). So then:
Where the hell is that book?
What book? Why is it so important? Who is looking for it? Again, a million questions and also a certain amount of dramatic tension that draws you in as a reader and makes you want to continue with the story.
You get the idea? Give it a go. If your first sentence doesn’t work, try another one. Sometimes the crazier the sentence is, the better.
The lepidopterist had only ever been to one meeting of the Peanut Butter Society.
I don’t know where that came from; I just allowed my brain to be a little more free than usual. I know I could make a story out of it, though. Could you?