Ask HN: HNers How Do You Hunt for Fortunes?

My question is inspired by a blog post by Financial Samurai.

https://www.financialsamurai.com/fortune-hunting-money-making-opportunities-in-stock-market/

In this post, Sam tells the story of how he turned a $3000 investment into $155,000 in 2 months.

How do you "hunt" for opportunities like these?