How do you impress a girl without her thinking you are trying to?

How do you impress a girl without her thinking you are trying to?

Well you could save the world.

Let her catch you doing nice things for other people with no expectation of reciprocation.

Edit: don't be a dork about it, though. Just be thoughtful; not a doormat.

Have other people tell her wonderful things about you, if they can do it without sounding scripted, that is.

Be yourself. Do nice things for people and don't expect praise for it. Be modest... thats sexy.