Bustle put together a great list of kissing tips.
Ladies, men were interviewed for this list. If you've haven't tried these, do so the next time you're in someone's arms. My personal favorites are:
Men, I'll let you in on a secret -- ladies like these ways of kissing, too! Particularly "Vary the tempo. Sometimes fast and urgent, like you are the last lovers on earth. Sometimes slow and sensual, like you're the first lovers on earth."
Now go practice!