How do you get back to work when you lose focus?

I use Ivy Lee Method to organize my work days, it's working very good for me :)

If it's deep, I'll keep everything aside for a day, change my laptop wallpaper to give it a fresh look, and clean my workspace so to give myself the feeling of a fresh restart!

Most of the time music does it for me! But I have different types of music and specific kinds of vibes that I go for depending on the situation. If I were to give one that works almost always and calms you, sometimes unknowingly, in addition to retaining great focus, then it'd be music options like Hans Zimmer or Binaural Beats. Great for concentration!

Most days, my focus feels like that for a goldfish on a roller coaster! 😂 Jokes apart, I try to follow the Pomodoro technique to maintain short bursts of focus. With small breaks every 25 mins or so, it becomes much easier to maintain focus.