Don’t worry about revealing your game-changing secrets; stealth mode is bullshit. Talk to everyone. Steer the conversation toward your interests and if someone there is excited about the same things, it will be clear.

It may take weeks or months, but in a good group you’ll find a handful of people that you really like.

What does their code look like? Have they done much open source? Do they demonstrate an entrepreneurial spirit? Can they stick with a single project for a long time? Have they been loyal to their friends and companies in the past?

A good cofounder should be someone with whom you feel privileged to work. And they should feel privileged to work with you. The two of you should be on very solid ground before you begin your startup adventure, because once you do, the impact of every argument is going to feel like it’s been multiplied by a thousand.

When it’s just you and your thoughts it becomes too easy to pick the first thing that pops into your head. We’re programmed to think all of our ideas are good, but reality tells a different story. Truly good decisions are forged from the furnace of argument, not plucked like daisies from the pasture of a peaceful mind.

A good cofounder tells you when your ideas are half-baked and ensures that your good ideas actually get implemented.

the constant lack of feedback and the absence of support during tough times can easily lead to a premature end to your adventure.

They’ll be the single most important decision you make during the tenure of your startup, so choose wisely and with extreme care.