Enter the reality of other people. Put yourself in their shoes. See life through their lenses. This leads to a sense of identification and oneness, and is literally the fulfillment of the mitzvah to "love others as yourself.

Of course, if someone's reality is counterproductive, don't stay there for too long! And the same applies to your own. You can't always change your external reality, but you do have the power to upgrade your internal reality.

Think of someone you have a difficult time understanding or being empathic with. The next time you talk to that person, try to enter his reality and see the difference.