When my symptoms were at their worst, I found the best way for it to go away was to breathe, slow down my heart, and continue through my day like nothing was wrong. For me, the worst thing to do was to panic - if I did, my vision would feel even more disconnected and I would feel further away from my body. If I treated the attack like something I knew would go away, as just a temporary hiccup in the day, the warped perception would recede. With practice, I was able to function normally even during an attack.
Another thing that helped me was talking about the experience with a non-judgmental friend in a totally objective way and trying to describe what I saw and felt (mine was more visual and spacial, not audio). Talking about it this way ended up being kind of fun and I think took away some of the stress of the episodes when they occurred.
You may also want to try to learn simple meditation. When I was in college I learned a technique that simply involved focusing on your breath. I think it was after this that my AIWS really receded. Today I experience symptoms maybe once a year.