First things first - before you approach any girl you will need to do your homework. No one likes to be approached by strangers who are insensitive. In other words no one likes someone who comes up then just butts in and makes it very clear that they have their own agenda and do not really care about what is taking place before they arrive.
So study the situation before you make your approach. This is the first key factor in eliminating the possibility of rejection.
Secondly you want to be on the look out for signals. Look over in her direction and see if you can catch her attention. If both of you catch a glance at one another then smile. If she looks away then looks back at you - then it is quiet possible that she is open to your approach. If a girl is open to your approach then she will be less inclined to reject you.
Thirdly be on the look out for body language. Sometimes here and there I do a dry run. I walk towards her try and see if I can get her attention. If I do I want to see her body language. If she immediately sits up and starts to fix herself then I know that she is interested in me approaching her. This is especially the case if while walking past her we make eye contact.
If a girl looks at you in the eyes then you can rest assured that she is not going to be pissed at you if you approach her. Women do give plenty of signals you just have to be aware of them.
Guy's if you are serious about getting the girl of your dreams then you need to seriously work on solid techniques to achieve your goal. If you know what a girl is thinking it is far easier to approach her. If You want to learn the tested psychological secrets of the female mind given to you by a woman because after all only a woman truly knows what a woman wants, then select one of the following links... You can learn this and a lot more.