What are some good relaxation techniques to use during anxiety or during a panic attack?

Try smoking (?): What! On a Health Website? I mean the breathing pattern - w/out a cigarette! Actually, many smokers benefit from the breath pattern w/out knowing the role it plays. The deep inhale, hold, and full exhale thru the lips is very good for you. It reduces BP and HR. Part of "I need a smoke!" is about this. So, don't use tobacco - but take the time of a cigarette and breathe that way whenever you want.

Panic/Anxiety Attach: Diaphragmatic breathing is a recommended technique. It is good to have a medical exam first to rule out underlying illness. You could seek psychotherapy from a clinical psychologist for a program to reduce anxiety. There are also medications to help with this. With good psychotherapy it can be possible for certain people to overcome the need for meds.