Panic sufferer,You are doing awesome now try this game - see how many people you can make smile just by saying Hello to them and smiling right at them.
Drink water, when we are stressing we need fluids so find yourself a special mug or glass and fill it with ice and drink from it when you start to feel your thoughts straying from HappyVille.
I always talk to myself when my anxiety is rising. I say something like this -
"It's going to be okay,
I know what this is
Just try to relax and let it pass."
I also do deep breathing at the same time.