Show curiosity and interest in others. Listen, Listen, Listen. You not only become more likable, but you start to understand the person's wants, needs and desires. People will gravitate to upbeat, positive, cheerful people. Display your sense of humor.
People remember humor six times longer than regular conversation.
Be able to speak on a variety of subjects. Keep abreast of current events. Be able to tell people what you do in a few short sentences. Speak their language. Talk in their communication style.