Define your boundaries.  Get clear on the scope of your job.  Know where your responsibilities start and stop.  Define how much time you will spend on specific activities.  Know when “good” is good enough.

Identify and focus on your strengths.  Know where you make the strongest contributions and focus on those things.

Delegate.  Ask yourself if you are taking on tasks that could be done by another person.  Are you enabling others by taking on their responsibilities and preventing them from growing?

“Shake it off” at the end of the day or as you move from one task to another.  This is a physical exercise that signifies you are done with a particular activity and ready to move to another.  Stand up and physically shake your arms and hands, as if you are slinging mud from your fingers.