I don't know how old you are, but girls between 13-18 often want to try new things sexually, so getting them to make out or even have sex with you is not especially hard.
There is not a universall way of getting someone to make out with you. The thing is that you have to rely on the techniques that is learnt here. C+F and having a lot of humor is essential.
One tactic many un-Don juanish people use is to get the girl drunk and then start to make out with her. Most girls manage to do this by themselves but it is not a victory or success in any way. I don't think there is a way of failing to get a drunk girl to kiss you.
The easiset way FOR ME of getting a girl to make out with you is doing this. You walk up to them and then start to small talk a little, make her comfortable, then let her start to talk emotions, let them describe the most romantic night they can think of or such to get them in the mood. When you have them thinking about romance, then show them that it is ok to kiss each-other. At parties most girls who do not have a boyfriend (or those with AFC's
) want to be a little adventerous. Shy girls in my experience is very hard to make out with on the first meeting. Go for the more sexcraved girl with a hooker-like reputation. She will help you a little more than the other girls.
As i said before, be a Don Juan in your way of acting and everything will be fine. Try to be C+F and just be a nice experience to hang around and the girls will fall in heaps. Don't come on too strong and most of all DON'T GIVE A ****!