the 4 kinds of side businesses you can start
"as far as i’ve thought about it, i think there are 4 ways you can build a successful side hustle:
- buy an existing asset
- launch a product on a marketplace with existing demand
- launch a unique, one of a kind product in a new space where you can buy demand (adwords, facebook, etc.)
- arbitrage (craigslist, airbnb, trading, uber)"