1) Make sure you wet your lips a little a few seconds beforehand. Wouldn't you prefer to kiss something soft and moist? This is why most women compulsively put on lip gloss or Chapstick when they're thinking about kissing you.
2) Pay attention to her reaction to what you do. Obviously you should be holding her in some capacity whilst you kiss her. If you feel her pull away a little, kiss less aggressively. If she seems really into it, maintain or push forward

The idea here is to match her level of intensity with your own.
3) Be aware of your environment. Nobody wants to be that couple who's eating each others' faces in public. Show some discretion based on where you are located and who's around; in other words, save the full-on-pornstar-makeout for the bedroom.
4) She should never have to wipe her mouth after finishing kissing you.
5) A little bit of suction, applied lightly, goes a long way.
Hope some of this helps
You boy,
870