I found this really interesting post here.
I especially liked how he stated the following, highlighted for emphasis:
3. Be considerate - Everyone is living in their own little worlds, but there comes a time when you just have to care for the little worlds of those around you. Like Einstein said, “you start living when you start living outside yourself” (or something like that). You cannot win or benefit every time, and even if you did, that would be one boring life. See how you can help others to win their little battles and you just might feel good about yourself. If you don’t, you might be an insensitive idiot, but since you are reading this you are not one so don’t worry.