I have always had a hard time avoiding distractions during working hours. My hyperactive brain wants to wander off distracted by any kind of noise around me.
Lately I found out that having a background ambient sound such as rain, wind, fireplace, really constrains me from any distraction.
In doing so, inspired by Noisli.com, I created a GNOME Shell extension with similar functionality.
It is quite simple but it does the job for me.
It is available for download at the extensions website: https://extensions.gnome.org/extension/1224/focusli/
Bug reports/feature requests are welcomed at https://github.com/felipeborges/gnome-shell-extension-focusli/issues