First and foremost RELAX. Just remember that everyone kisses differently and everyone likes different kinds of kisses. Talk to the person you're kissing and ask them how they like it. Then "practice" together...
The secret to being a good kisser is having a good breath always. With a good breath, everybody will try to kiss you. You can use some mints but not gum, because it will create a lot of saliva. Try kissing just one of their lips and sucking on it. To learn more, go to http://www.ehow.com/how_5341961_become-better-kisser.html.
It's not scientific it's emotional it's in the moment, relaxing is something you need but also you need to let it flow from your mind of thought no thinking just feel take it slow at first when you are with someone new. Don't be nervous I certainly was though with my first real kiss and I was shy didn't really do much but after I got comfortable I went for it and my boyfriend enjoys kissing me more than anything. It's his favorite thing to do with me at least one of them ;)
to be honest....i think stayin calm...relaxed nd lyk jst kissing...lyk not trying! lyk of course u hav to kiss back, nd try kissing, you know...dnt just sit ther! aha!! ;) but dnt be lyk trying to make an impression or showin off your kissing skills. and dont frreak wen your kissin cuz trust me...ITS NOTICABLE! b/c then u start shaking nd yea....it jst gets kinda awkward.... jst keep it koool!! :) you know wat I mean?
Good breath-- and long smooth , clean nicely scented hair makes the guy you're kissing feel attached.. Also light perfume and deodrant also help heaps.. GOOD BREATH IS JUST A *duh* bonus lol. Strawberry mint always helps and also just plain mint is awesome.