Get a binaural beats study ‘soundtrack’ on youtube:
Proven (to a certain extent) to aid focus, mood, reduce anxiety and some aspects of creativity.
Set and start a Pomodoro timer – http://tomato-timer.com/
This allows you to work it ‘sets’ of 25 minutes, with 5 minutes break in between. Ideal for focus. Wait until your 5 minute break to think about what else you need to do etc.
And off you go…
If you don’t like binaural beats, instrumental rock (or any music without vocals and with a beat) seems to work just as well for focus.
Here’s an interesting infographic too – cancel all meetings is the basic, underlying message by the looks of it!