How does one make dawah (الدعوة) to an atheist?

Making Da'wah to people of other religions may have similarities, but there are different ways to do it. For example, there is one way to make Da'wah to Christians that is different from the way you would make Da'wah to Jews; additionally the way one might make Da'wah to a Christian may vary according to which sect they follow. Is there a way to make Da'wah to a non-religious person -- specifically, a person who doesn't believe that there God exists? What are the major points to keep in mind while making Da'wah to an atheist? What major points should be considered aside from the fact that they do not believe in God?