It used to be that one had a unique interest, profession or capability. This uniqueness causes them to see a gap in the market that could be filled by a new business. They work on filling out that gap, going as far as the customers and their capabilities will take them.
But that's too limiting. Because their interests and their customers might not lead to infinite growth! So instead you need to burn your life looking for that ONE business that will take off.
So shoot at everything. Burn your business, burn your time, burn your customers (this I detest the most), burn your intellect. Maybe get a shot at joining some club that no one cares about, except the other shooters.
The correct path is neither a shotgun blast on all available ideas, or a march to the death on your pet idea. It's a coherent expansion of effort based on feedback, capabilities, risk and likely return. Otherwise known as being in business.