Breathing

There are lots of breathing techniques out there and they can be very useful. Here is one that works for panic and anxiety. It changes the mixes of gases in your lungs to help you calm down.

Firstly, don't be ashamed - most of us experience strong anxiety at some time in our lives. This technique is unobtrusive and may make life easier for you, though it isn't a substitute for working out the causes of anxiety and/or working on them.

It takes practice. Try and do it several times a day if you can, especially during stressful life periods.

Breathe in for the count of 1
Hold for 1
Breath out for 1
Hold for 1
Breathe in for the count of 2
Hold for 2
Breathe out for 2
Hold for 2 ......

Build up slowly so you can get to 10.

It only takes a few minutes.
You can do it at your desk or on the bus.
Maybe not while driving until it becomes automatic.

Anyway - give it a try and definitely let me know if you get some benefits.