Here is the simplest tip that makes a huge difference in my practice – when you have to get focused work done, get rid of all distractions.
Turn off the volume on your phone and put it somewhere you can’t hear it vibrate or see any notification lights come on.
Close your web browser for your email too. If you can’t tell that people want you, they can’t sidetrack you.
Your emails, text messages, voicemails, and other messages will be waiting for you when you’re done with your work.