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Take a step back. Deep breath. Slowly inhale, hold it for about four seconds, very slowly exhale. Helps with many things including anger, anxiety, stress, just feeling overwhelmed in general.

Recognize that it's okay to be frustrated and angry. What's not okay is to let it consume you and have it be a reason for hurting people.

Allow yourself to feel it, but not feed it. Let it settle without engaging.

I suppose that's the hard part. To help with that:

Observe. Try, but don't push yourself, to disengage. If you find that you're forcing it and that ends up frustrating you more, start again. It's okay to not get it quickly. It's actually pretty normal for it to take a while. Brain also likes to fight you sometimes. Don't bother fighting back. You won't win and it only gives it more power. So we go back, take some more deep breaths, slow exhales, and continue.

Identify the cause of the issue and that's where you immediately drop it. If it's physical and you don't really have a place to sort of retreat to, this can be difficult and I don't have a good answer. If it's online or something, and I know it's "easier said than done", just exit the window. Nope out of the application. Allow yourself time to collect yourself.

Realize that it's probably out of your control (very few things that people get angry about are really their fault or something they can control).

Identify what is in your control. Consider engaging in that instead, particularly if it's something that brings you joy. This will allow you to not necessarily replace it, exactly, but to give something else more power.

Remember that everything passes. Nothing is permanent. Think of it as a storm in the sky. Storms come and go, but they are not the sky eternal. Storms are wrath and rage, but they subside, much like anger (and most negative emotions).

A nice quick verbal reminder might be "the clouds are not the sky". Or the old "this too shall pass".

Alternatively: embrace the chaos and use it in a productive (or even dumb but not hurting anybody) way. This is situation-dependent and works differently for different people. Some get it out with writing, some with art, some with music, some with physical activity (again, no active harm, unless it's sanctioned like boxing or martial arts something), some with games that allow you to just go crazy and let it all out. Lots of other stuff I haven't listed here, but hobbies are good.

Maybe also see a therapist who specializes in CBT if this is a constant thing that affects your daily life.

Source: lifetime of bipolar disorder (among other things) which looooooves to suddenly throw me into easily being annoyed or frustrated when the hypomania hits.

Luckily, I'm asocial enough that I'm able to peace out of the outside world, which is something I really need to remember when giving advice like this, because a lot of shit that works for me is impractical for a lot of people.