What's the most useful social skill?

Meditation allowed me to look back at myself clearly. When I looked back on my life, I realized that I was a person who is calculative and selfish. Deep in my heart, I always think about how I can get from others. There were many expectations and wants I had for others. And I used to take the other person’s favor for granted. Because I treat people with this mind, of course, it was difficult to build relationships with me. I hadn’t realized I treated others in this way. Maybe I’d never know my real state of mind if I didn’t look back on myself with meditation.

Using the meditation method I diligently discarded the causes(from life live) of my way of treating people. I discarded cause of expectations, selfish mind, mind of blame, mind of taking it for granted. More I let go cause of my mind, I have changed. In the past, I could easily calculate whether a person was helpful to me, but now I find it easier to be sincere with people. I’m able to be grateful for others.