How do I kiss a girl?

I know it sounds simple, but I've never had a girl friend, and when I get one I want to know how to kiss her.

I have been trying to read up on it, but I can't find any real dos, and donts. This is because what on person likes, another might not. But on the first kiss is it true to not use the tongue, not trade spit too much, is it better to just give her a little peck on the cheek?

And when you really get serious, what are some signs that she likes what I'm doing, or not doing? And what can I do different than just puckering up and making contact with her lips?

And if you do tongue kissing what do you do? It sounds weird to just stick your tongue in her mouth xD do you move it around in a certain motion, concentrate on a spot in the mouth?
How do I kiss a girl?
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