📝Distraction-free phone
The idea is to remove all distracting applications from your mobile phone, including:
messaging apps
social media
news
browser
The phone is still usable for many things, including calls/sms, maps, music, note-taking, time, calculator, etc. Besides, it is quite easy to re-install an application if you really need it.
See also:
Disable system application on Android (it might be impossible to disable some system apps from the UI)