Hi there, I have anxiety and use to have quite a few panic attacks, not so many these days thank god!
But for me I found the best thing was distraction. Doing anything I could that would get my mind off the panic attack. I was going to see someone about the panic attacks who suggested focusing on the panic attack and breathing, taking deep breaths and breathing down into your stomach....this didn't work for me. I use to drive for work and have panic attacks in the car, I use to think....will I make it to my next destination without passing out because I couldn't breathe properly, then when I got there it was like a switch and the pinic attack would be gone...until I got in the car again.
So guessing everyone is different. If I find myself heading that way now, I lie down and imagine myself somewhere lovely that I've been before and try and focus all my thoughts there.
Hope this is of some help smile