Don't be afraid to allow the conversation to get off on a small tangent.
Concentrate on simply meeting someone new and learning a little bit about her -- don't think of her looks, her mannerisms, or whether you think she'll make a good wife.
You can even tell your date in advance that this is the time frame you feel a first date should follow.
This gives the two of you a chance to feel more comfortable in each other's presence, minimizes awkward silences, and gives you something to build on for your second date.
We recommend that the first date be considered an ice-breaker.
Meet for coffee or dessert, and plan on seeing each other for no more than two or two-and-a-half hours.