@A minor: Maybe you cant force state, but certain behaviors do help to bring it on naturally.
Smiling consistantly works wonders, especially if you smile at girls on the street, especially when they smile back.
Thinking about good times, happy days, and past exploits is great! Especially if you are focused on negative issues. Push the negative thoughts out of your mind not by focusing on them and saying "I dont want to think about X" but instead by changing your entire thoughts and focus over to Y or Z.
Listening to energetic music, if you relax and just get into the beat, will certainly elevate your emotional state. Thats why we have music.
After that, it is pretty easy to just BE in state, to know you are out and having fun and that is what its all about, and then yeah, the girls gravitate towards you.
