I notice when I am taking a girl on a date, I'll often run out of things to say and then if she isn't offering anything I'll just go into interview mode, fishing for something interesting to talk about or something we have in common.

I tend to do best when I can make a girl laugh or smile at something but it's hard to pull out of thin air. So how can I get to know a girl and make her feel comfortable with me without going into interview mode?