What is the best way to focus on the work and not get distracted?

Elgar Q.
Turn off your phone, block websites that distract you on your computer, set timers for how long you want to work on a certain task and do nothing but that task until you finish it or the timer goes off. I would also recommend you wear headphones and listen to music that isn’t distracting, such as jazz or classical.

Hans Uwe X.
Hi, I use Bose headphones with noise reduction. This puts most people off from interrupting and helps stay concentrated. HTH.