Often, done is good enough. Don't set your standards so high that you make impossible to finish a task or project. Ask yourself whether anyone will notice the improvements. Don't say yes without checking your calendar first. Over-commitment can lead to overwhelmed, which is not a good combination.
Interruptions can take control of our time.
They break our concentration and rob us of valuable time. Control phone time. Leave a detailed message about the reason for your call, and let them know a good time to call you back. Choose a system that works for you. There are any available to choose from.