Hyperventilating does anyone have any good remedies - breathing techniques ?

Try practicing belly breathing, sit with your hands on your belly and breathe in your belly should rise. If you keep practicing this you will find you'll start to do it naturally

Simple trick that helps me EVERY time

Breathe in for 4 seconds breathe out for 8 seconds.

I read that getting your head below your heart helps with anxiety. And another technique is to breathe in a paper bag. But I didn't check either of these out

breathing into a paper bag has helped me. Hold a bag tight over your nose and mouth and then just breathe. Need to do it for at least 3 minutes to rebalance the oxygen/nitrogen mix in your body. It works by resticting the amount of oxygen going in. When you breathe fast and shallowly, as you do when you are anxious, you take in too much oxygen into your bloodstream. AS somebody else has mentioned, breathing in for a count of 4 and out for a count of 8 has the same effect. Good luck. Remember, these techniques are just to make you more comfortable. Hyper-ventilating cant do you any harm so even if you do nothing no harm will come to you. It will just feel uncomfortable.