What are basic flirting techniques?

Flirting is the first way for potential mates to check for compatibility.  Well, that makes knowing what flirting is a little easier, but doesn’t help with knowing how  to flirt or how to recognize flirting.  Seems that flirting is a skill you either have, or need to attain quickly.  Learning some basic flirting techniques is something both males and females need to do.  Even if you don’t plan on applying the flirting techniques, you still should know what the person who is flirting is doing, so you know how you want to respond, whether to smile in encouragement, or politely turn away.