This app was mentioned in 4 comments, with an average of 7.75 upvotes
Going through some MASSIVE stress right now caused by anxiety and I've been doing the following to manage it.
Breathing exercises
Listen to music, or change the type of music I'm listening to. Sometimes Peaceful music is what I need, sometimes I need grindcore.
Anxiety app on my phone to help my brain process the anxiety or thing I'm stuck on. Takes about 10 minutes to do a session.
Eat properly and at reasonable intervals to keep my body happy. Unhappy body == more anxiety.
Hangout with friends after work and do fun things.
Exercise, just basic cardio can help ease anxiety.
Video games that aren't stressful for me.
Watching re-runs of TV shows or re-watching movies. I can't find the source right now but something you've seen is more calming than a new TV show since you're brain doesn't have to think about it as much and there won't be any surprises to put you on edge.
ABDL Stuff -- wear a diaper to bed, use a pacifier, hug a plushie, play with toys, etc.
Play my bass, guitar, or drums. Sometimes write some weird music.
Talk to your GP (doctor) about the stress, they may recommend a therapist/counselor.
Meds -- Depends on the source, don't self medicate, see a doctor
A big one for me was finding people in my social circles that were toxic and limiting exposure as much as possible.
Stay off social media as much as possible.
There are more things but those were what came to mind and it is already a sizable list.
I'd say it's worth a shot. I've used this app which is based on the same principles and had some success with it easing my anxiety and intrusive thoughts: https://play.google.com/store/apps/details?id=com.overcomingpain.anxiety
I have a fitbit with a built-in guided breathing exercise. There's apps for that sort of thing too, but it's nice to have on my wrist.
I also use an app that has bilateral audio stimulation (https://play.google.com/store/apps/details?id=com.overcomingpain.anxiety) if I'm in a place I can pop in ear buds. Neither are "cures" but both will help take the edge off a bit.