Today you're going to pretend you're not an asshole

On the way to work, you're not going to yell "get out of the way, fatso!" at the fat, slow-moving, jay-walking pedestrian in the path of your bike.

In the elevator at work, you're going to smile politely and chit chat with the nosy twerp who works down the hall. When he inquires about your private life as if you're good friends, you're not going to punch him in the nose and tell him to mind his own business.

When one of your labmates asks you for help on a basic protocol, you aren't going to say, "Read the goddamned protocol before you waste my time." You'll patiently sit down with him and explain for the fifth time that step 2 goes after step 1, and so on and so forth.

While you're waiting in line at the grocery store behind the balding, middle-aged guy, you aren't going to say "Just thought I'd let you know - I can still tell you're bald underneath that combover. Oh yeah, and you have really bad body odor."

As you pass by a street musician, even though her singing sounds like cats being tortured, you aren't going to offer to pay her to stop singing.

Later in the evening, when your friend stops by with her new baby, you aren't going to tell her that her baby is in fact the ugliest baby you've ever seen. You're going to play with the baby, make her some tea, and offer her some cookies.