Reading Social Engineering by Chris Hadnagy gives you crude knowledge of how hackers, thieves and conmen think. So if you look at the wall from outside like a bad guy, you'd be safe from inside.
Goan buy the book if you are buoyant, or download free copy from the internet.
As a founder or entrepreneur. Every member of your team should read this book. Also, parents, students and security personnel should be indifferent. Irrespective of your carrier, this book is indispensable in every library, non digital or digital.
Perhaps, you may want to watch this amazing interview about the guy, just click here