How can I calm down when anxiety hits in a situation?

Noticing warning signs like breathing , tense shoulders and other things is a great way of managing yourself and space before things get to the point like it all feels to much ! Once you notice the anxiety has impacted on your feelings then breathing and calm thoughts help with mindfulness tools ...

Try and use breathing techniques is the best way or try and think positive thoughts which is likely

Take a step back, from the situation and from yourself. Ground yourself in the present--using whatever techniques work for you; deep breathing, muscle relaxation, mindfulness, positive and rational self-talk, etc. Ask for help if you need it; ask for space if you need it. And tell yourself: you got this.

Take deep breaths. Inhale and exhale for about 3 seconds each time. Close your eyes and think to yourself that everything is going to be just fine.

In such situation, I will drink plenty of water, or write down my anxiety to get it out. If there is a possibility, I will find find someone to talk.

I like to use a grounding technique: I try to list 5 things I can see, touch, taste, smell, and hear in order to draw myself back to the 'present'.

Think about someone who makes you happy, or something that makes you happy. Maybe think of your pet dog if you have one. Maybe think of your best friend. Zoning out and imagining that you are in your happy place could be a good idea at times.

You can do different breathing techniques and keep reminding yourself that there's nothing to worry about.

In my experience the best way to calm down is to entirely focus on your breathing. Take long deep breaths. Every breath you take inward think in your mind "in". Every breath you take outward, think "out". If you get a good rhythm and really shut out everything else except 'in and out' you should be able to calm down. This only works however if you really commit to thinking those words only as loud as you can in your mind, just breathe, it will be alright.

Sit or lie down, and take deep breaths. Its easier to think of something that will distract you healthily like reading a book or watching a movie