I use a variant of the Pomodoro technique: instead of having strict breaks when the time is over, I just receive a sound notification at the end of the focus and the end of the breaks.

Then, every 10 minutes, I get a new notification.

It's a small mod but it changes a lot my perception of the technique. It creates a lot less frustration as I can finish the task I am working on without losing track of the time passing.

I coded a web version of this variant here: https://focusplus.io You can try it, it's 100% free (still in the early days tho)