David Lynch: “Ideas are like fish. If you want to catch little fish, you can stay in the shallow water. But if you want to catch the big fish, you’ve got to go deeper. Down deep, the fish are more powerful and more pure. They’re huge and abstract. And they’re very beautiful.”
The best stories are often the trickiest ones. The good and bad things about stories is they're a kind of filter. They take a lot of information, and they leave some of it out, and they keep some of it in. But the thing about this filter, it always leaves the same things in. You're always left with the same few simple stories.
It also helps to travel in topic space. You'll have more new ideas if you explore lots of different topics, partly because it gives the angle grinder more surface area to work on, and partly because analogies are an especially fruitful source of new ideas.