How can you break into a conversation about if they are unsure if there is a God or not?  How do you find out that they are an Atheist?

One effective method to ascertain someone's beliefs is to pose a question such as "Do you believe in God?"

If their immediate response is not "No!" ask this: "If you believe that there is no God, we will call this a zero (0), or if you are absolutely certain that there is a God, we will rate this a ten (10). How would you rate your belief on a scale of 0 to 10?"

Ever had someone state emphatically that they do not have any spiritual beliefs at all?

You could try just talking them around but many people today respond better to visual communication as well as talking.

Youth today have an attention span of about 1 minute. Just look at their browsing habits.

Someone who has just tried to shut you down and end the conversation probably can only stand about another minute or so before they walk off. What can you do in a minute?