There’s a thing that happens when you write, and it’s that story ideas keep coming at you, like hailstones, like bullets, like drops of rain during a monsoon. This is something non-writers often fail to see – they come to you and they tell you “You know? I’ve got a great idea for a story! Let me tell you, so you can write it and make lotsa money…”
And you think, “No, please, not again…”
Then they wink and mention their share of the profits.
Ideas are everywhere, you only need to keep your eyes and ears open.
And then you need to learn to filter them, and keep the good ones, and know which goes with what to build a story.
It takes some experience – you need to read and write a lot.
Then one day you are browsing Facebook, and you get the full package – a story that wants to be written, all there, all in one place.