Off the top of my head things that will make you more attractive are (see 'The Mystery Method for more detail'):

-Being Healthy/In-shape
-Grooming/Hygeine
-Fashion Sense
-Sense of humour
-Confidence
-Lack of Neediness
-Alpha Male characteristics

However, I interpret your question as though you want the girls to approach you. If you want to get the girls you really want you are going to have to do the approaches more than likely so dont wait around!