How do gain empathy?

Let's make the world a better place Reddit. I'm wondering how you can gain universal empathy. Personally, I feel like I lack empathy, whether it's for strangers, girlfriends, or starving children halfway across the world. Sure, in specific and highly visible cases, like Kony or homeless people, it's easy to feel bad, but I'm talking about really being able to see yourself in their shoes. I also feel like empathy is one of the most important traits in life, whether you are a psychologist or a salesman. So, share your stories about empathy or tips on how to improve your own ability to empathize.