It seems so difficult, doesn't it, but it actually isn't. All you do is show genuine interest in her as a person. Not in how quickly she'll allow a clinch or more, but find out what her interests are, how she spends her time, what her favourite artists are and the most exciting things she's done.
Don't be too ready to boast yourself. Girls don't appreciate boasters. What you need at the back of your mind is 'Do we like the same things, do we have similar attitudes' This will tell you whether a second date is a sensible move.