What I tend to do before a really stressful meeting, or day at work, is to view the bio-electrical signals in my muscles as light, and then extinguish it slowly. If I can make your body go into a slightly paralyzed state, just for a few minutes, where even my eyes and face are too relaxed to move without a jump-start, then by the time I have to go to work I’m usually too chill to care. Though, a few times it’s been too powerful, and I’ve felt like I was a bit high, probably due to the stress hormone ratios being too low.
You can also do the Stoic meditation, which is essentially to visualize the worst possible outcome. Like “So I could lose this job, it’s not the end of the world, I can find another”, and so by putting the bad into the perspective or even worse things, anxiety goes down.