How to interest people?

The 5th way to make people like you is to talk in terms of the other person’s interests. This is a very efficient way, because in most cases person think only about himself and don’t think about partner’s interests. This is a needful information for me, because I like an average person first think about myself when I converse with someone. But this chapter helped me to understand that if I want to make people like me and influence people I should understand that parnter’s interests are very important thing.