Everyone in the civilized world has already heard about Jesus. The ones who choose not to believe in Him don't do so out of ignorance of the message. Just trying to evangelize to them usually doesn't work. So I have found that the best way is to act kind and gracious. If they ask how you can be so happy and pleasant, you rightfully attribute it to Christ. This is more effective in making them want to convert. Just hearing about Jesus isn't often enough, people need to see how He can influence people's lives.