>How did you develop your listening skill?
I'm not sure...I've always enjoyed listening to people's lives. Everybody's life is totally different than mine. Everybody's experiences are different than mine. By listening, I'm exposed to things in the world I would never be otherwise. Both good and bad...but still.
>How to be more empathetic?
It might seem cliché but, put yourself in their shoes. Imagine yourself going through the things they're telling you. Imagine how you'd feel. Not what you'd do to solve the problem, just how it would affect you emotionally as it happened.
>What common failure modes do you hit in your relationships as a low empathy person?
>How do you avoid them?
I don't know when to shut the fuck up. People don't always want to hear solutions, they don't want to hear about what could have been done or anything at all sometimes. Despite best intentions, sometimes the best thing you can do, to put it bluntly, is shut the fuck up. Resist the temptation to give advice or opinions, just listen and acknowledge. That part can be hard though.