Find some music that if you play it, you really feel like you can do anything. You know, that feeling when your being asked something and you're like: 'I can do this' and smile with a slight grin on your face.

Try to find a decent amount of songs where you have that feeling with. (I personally experience hiphop and trapmuzik work the best for me.) Once you have a small list of those songs, play them wherever you're going. On the train, in the car, on the bus etc.

It is really giving me a confidence boost when I arrive at my destination. Now go on and look that girl straight in the eyes for 10 seconds.

On my phone