I'm currently reading "How to Win Friends and Influence People," but I'm having a hard time figuring out how to use the techniques Carnegie talks about in day to day conversation.

Let's say I'm flirting with a cashier, or a girl at Target. How do I give them what they want, and spike a genuine "want" out of the girl?

For me, the initial conversation sucks unless you can find something to talk about within 2-3 minutes