Two ways are quite common seen in my country. No.1, the Internet and related social APPs on the phone. This trend is becoming more popular than used to be and apparently we all like it for real. No.2, different parties and social activities. Include sport games, local companies or in the library. We might make friends from different kinds of places actually. But I think in the future more and more ordinary people, like you and me for example, might be willing to do this on the Internet more often in life. That is it .