I write a lot about gaining trust and it all comes down to a simple rule. Care about and focus on, the other person. And keep a lid on your self-interest, as that is the quickest way to lose trust.
There could hardly be a better way to demonstrate that you care about a person than to make them feel extraordinary.
Here’s a great story from Barry Devret that illustrates perfectly how to do that. I’ve overcome the temptation to summarise or comment on the article, as that would only detract from it. You should read it in its entirety. It’s that good.
And when you’ve done that, take a look at Barry’s other articles. They’re all that good.