Stashed in: Networking
This is the best and most nuanced article that I've read on Dunbar's number (150).
What 10 things should you do every *week* to improve your life? - Barking up the wrong tree
There’s Someone I’d Like You to Meet… How To Use Introductions to Strengthen Weak Ties and Advance Your Career | The Art of Manliness
Getting Along with People
Six Simple Skills Anyone Can Learn to Improve Earning Potential