when you are about to part after a date or something, hold both her hands into yours, look into her eyes, say something if u want like "i had a good time etc", make sure she is looking at you, keep looking for a few seconds, then take a forward step, and kiss her on the cheek, slowly. then look into her eyes again. make sure ur close, not too close. read her body langauge e.g. if she looks away let it go. be cool. it'll all look fake though if u don't mean it. good luck.