There are little things a person does that end up revealing huge things about their personality. Does this person discreetly pick up random trash that others have carelessly left behind? They probably call their parents weekly and give good head. Did that person just get totally schooled by someone at their own hobby? Did they take it in stride and seem genuinely interested and impressed, or did they sulk and roll their eyes because they got knocked from their mighty throne?
To be inquisitive of the way people react to situations and people is a skill that's hard to master. But once you do, it's like you can maneuver through the bullsh*t with the simplest of ease. You start dating someone new and he takes you out for dinner one night. Everything seems to be going smoothly up until the check. He tips 10% on great service. Run, b*tch, run! The way a person treats and tips waitstaff is always a tipoff in how considerate they treat other people, especially you. You know this bro isn't eating you out and making you come on 10% tipping, amirite?!
So take note the next time things don't go as planned at work. Which one of your coworkers freaks the f*ck out and starts running around like a crazy person? Which one takes control and gets the job done? And who couldn't give less of a f*ck and is chilling in the break room eating leftover Chinese and Snapchatting their mom? When you know how to get around people's idiosyncrasies, you can use that sh*t to your advantage.