Approach the thing you are avoiding, gradually
Avoidance is what maintains anxiety. Not the fear itself.
Do this
List the feared situations from mildly uncomfortable to worst. Start near the bottom. Stay in the situation until the anxiety drops noticeably, rather than leaving when it peaks. Repeat until it is boring, then move up. Do not use distraction or reassurance-seeking while you are in it.
Why it works
Every avoidance is a small confirmation that the threat was real and you escaped it, which strengthens the fear. Repeated approach without the feared outcome updates the prediction. Exposure-based therapy is among the most strongly supported psychological treatments that exists.
Where it fails
Doing it badly can sensitise rather than habituate - too big a jump, or leaving at peak anxiety, makes things worse. For trauma, panic disorder or OCD this should be done with a clinician, not improvised from an article.
How you’ll know
The same step should produce less anxiety on the fourth attempt than the first. If it does not, the step is too large or you are subtly avoiding within it.