Make sure that the conversation was supported by all participants. Avoid monologues when he says only one person, most likely, he will tire of the interlocutors.
A very interesting topic for conversation - travel. Share your experience and ask others where they visited. You can also ask about where the source is planning or wants to go.
Play the game. Take turns to ask different questions. They should be interesting and funny. But be careful not to confuse the interlocutor too honest questions, or he may stop communicating with you.
Avoid such mundane topics as the weather. It is interesting that the meteorologists.
Don't start talking about yourself if not asked. But if asked, don't call too many names, too much information, which makes the story uninteresting. Also in a situation analyze what facts from the biography you can tell this or that person and which are not.
Talk about the situation you're in. For example, if you are sitting in a cafe, we can discuss this place, to raise the topic of favorite food and drinks, to remember places in which you and your partner love to be.
Do not flame issues. Otherwise, have your partner give the impression that he is questioning. The questions imply a detailed answer. Better if before the question will be a declarative sentence. For example: "yesterday I skated. Do you know how?".
If faced with a topic that was not good, and your companion is OK, then ask him to tell you a bit about her. So you learn something new, and the narrator will get positive emotions from the fact that something useful and carefully and listen with interest.
During a conversation will occur themselves, more importantly, for people to have fun with each other and had a desire to continue communication.