Pick a co-captain who sees things differently. Two identical brains only cover half the field.

Choosing someone who thinks like you is comfortable and expensive. Two people with the same instincts notice the same things and miss the same things, which means the blind spot doubles instead of closing. A partner who reads a situation differently is annoying in exactly the way that keeps you from walking into a wall.

When you next pick a partner, a co-lead, or a study buddy, resist picking your mirror. Choose someone whose strengths make you slightly uncomfortable, then actually ask what they see that you do not.