When I get bored, I pretend to put a VR headset on and take over my friends lives. I look at all the obvious mistakes they're making and start fixing them. Once I've got clear on what they're doing wrong, I say "gotcha" to myself. It was an exercise to find my own mistakes. I assume I'm actually making the same theme of mistake as them, but it's easier when you're analysing other people than yourself. Try it.