Repeating a verse is a good thing to do; it's worked for me before in the past. Also, a line of a song has really helped me before, one that Rich Mullins wrote:
So hold me, Jesus, 'cause I'm shakin' like a leaf. You've been King of my glory, now won't You be my Prince of peace?
Also, try "touch therapy." Find something - anything - that you can touch, and notice its texture. The wall, a chair or other piece of furniture, your clothing - notice what it's made out of, what it feels like - categorize it in your mind - what does it feel like that you've felt before? etc.
Pray. Give Jesus your anxiety. Imagine it's a bag of lead on your back, making you hunch over... then hand it to Him and He puts that sack in a sack on His back, and it doesn't bother Him at all. That helps me sometimes.
Find something of yours that is small and holds memories for you, and play with it. Rub it, turn it over in your hands, notice its color. For me, it's my wedding ring. I play with it, turn it 'round and 'round on my finger, sometimes take it off and read the inscription and remember the day we got married.
Imagery. Imagine yourself somewhere that you love. Somewhere safe and peaceful that holds only good memories for you. For me, it's a little place in the woods by my parents' house that I call Willowhaven. There's a little nook under a rosebush/grapevine tangle where I used to go... a little creek... a squishy area that was always green, even in winter...
I hope some of that helped.
s Hang tough. And what deep breathing techniques do you do??