Neutral open-ended questions are the key. Never ask: "what do you do for a living, how much money do you make, religion or politics views, for or against having kids?" There are ways to find out if you are compatible enough for a second date. If you are then you have the time on later dates to find out if there are any deal breakers. The first date is not the place to do that. The idea is to find out if you like each other enough to want to get to know each other more, not find out every thing there is to know about each other.