The mindset to survive in a highly uncertain environment.
Starting a startup doesn't even take a day nowadays, thanks to initiatives like Stripe Atlas.
But being ready to survive in a startup environment is not so easy.
Unlike traditional businesses, here the level of uncertainty is incredible. Normally, many people will fold due to this and go back to a regular 9-5 and I don't blame them.
It's a game not meant for everyone. There is uncertainty everywhere.
You don't know who your customer is going to be.
You don't know what's a must-have problem that he/she wants to pay for.
You don't know whether that market will last for many years or not.
In my experience, the greatest learning began after I dropped the idea that I knew something.
So now I am forced to learn. Every single step in the way.
That mindset applies to life in general but definitely applies more in startups.
Be a student.