Breathing in and out three times is enough to release the tension in the body and smile, and then continue your work. If we're in the middle of a conversation, hearing the bell of mindfulness can be a helpful reminder to practice mindful, compassionate speech. Source.
At the Plum Village, they have a mindfulness bell ringing every 15 minutes as a reminder to re-center yourself and stay present. I wanted something like this for my work computer since it's so easy to get carried away at work. There are many apps that do this: some of them are free, others are paid. Some are available as browser extensions, others are only available through the Mac App Store.
I don't like installing new stuff unless I have to. I like to figure out whether I can solve my immediate problem without adding anything new. Plus, I wanted the bell to ring at the 50-minute mark which wasn't supported by a few of those apps. Fortunately, on a Mac or a Linux machine doing it yourself is pretty easy:
crontab -e50 * * * * afplay /path/to/bell.mp3And there you have it. Enjoy!