This is very important. There is nothing worse than kissing someone with bad breath.
If your date consists of having something to eat before the actual kiss, make sure you have a mint on hand to take right after you finish eating. Don't take the mint just before the kiss or chew on gum. You don't want to have something in your mouth when you kiss.
You want your lips to be slightly moist when you kiss. Run your tongue over your lips once before you kiss. Don't wear lip gloss because that tends to make the kiss too gooey.
And don't wear a lot of lipstick unless you want your partner to wear it too after the kiss. Slightly moist lips makes it easier to move your lips over your partner's and gives both you and your partner a more pleasant experience.
Stand close to your partner. As the two of you move closer together tilt your head slightly. If you can see which way your partner's head is tilting, tilt your head slightly in the opposite direction.
Just before your lips meet, close your eyes. Some people prefer to leave their eyes open during the kiss. But until you know what your partner prefers, it is best to close your eyes.
Open your mouth slightly and place your lips over your partner's lips. Do not hold your breath! Breath through your nose. As your lips meet, press them gently over your partner's. You may wish to move your lips in a slow, circular motion or just leave them still over your partners.
This is like the type of kiss you'd give your grandma or aunt. Instead of opening your mouth when your lips meet, keep them closed. This is also a good way of letting your partner know this is as far as it goes. It also makes a great hello/good-bye kiss or a great first time kiss if you're nervous.