Your awareness is great to have, the higher awareness is the best because you will be able to notice things a lot faster the normal

to increase it
1: military is an option but not a wise way to go

2: games like paint ball or even simple tag can increase it

you will see differences in your life with a high awareness

Meditation in pure nature(like in the wild or by a seaside or beach). Best way to achieve that, ever.... The feeling is too good to explain and your awareness will naturally increase. Most of us who practiced for some time already knows that when doing spiritual practices your physical senses will increase before your spiritual one. Increase of either eyesight, hearing, feeling ect. Some of us increased all our physical senses and some only a few. I increased mostly my sense of feeling and hearing. I can feel things happening around me at a sharp pace. Meditation! lol, really guys, explore meditation!

I agree with Nazir...one more thing is that you increase ypur aura too with practicing tk.
What I try to do when listening to music is that I focus my attention on one particular instrument for the entire song. Another great way to increase your awareness or focus.