Work around what automatically distracts you
We live in a world of seemingly endless distractions and interruptions. By hard-wired nature, the brain falls for it, and gets hijacked. Effectiveness falls away.
One simple but powerful way to manage this is to simply start noticing it. Raise your observation powers your awareness of how you tend to automatically do what you do ahead of what matters—and this awareness positions you to change it. Right now, pick the top one or two things that, across the day, derail or distract you. Now, think ahead to a way that you can catch this happening, and deflect that distract or fend off that interruption. At once, you will notice your effectiveness rise.