The author of The Subtle Art of Not Giving a F**k struggled for 15 months to write his best-seller before he stumbled on the 4-hour rule. It changed everything.

I made a rap song in only one hour! Writing, recording, and mixing a song isn't a quick process, but we're gonna speed it up a little today. Let me know what you think. Thanks for watching! Prod. by ...

I set out with a goal to make a rap song in one hour. But with not much in the department of musical ability, I struggled to put together a coherent song. But after three tries at it, I was eventually ...