What are your best passive income ideas to earn more in 2024?

Hey everyone, I'm still figuring out the best passive income methods to try out. I've learned about passive investing by following this playbook, but consulting and starting a business aren't so passive.

Now that we're 4 months in 2024, what have you tried that works and doesn't work? If you have a successful passive income stream, can you go into more detail about how you found the idea, how you started it, and what you did to make it successful? I'm trying to learn as much as possible about how people here have made their passive income streams successful and what it took to achieve those results.