Keep interruptions short and you will solve a huge part of your time problem

You can't stop interruptions from happening, but too many routine disturbances will ruin your plans for the day. While you can't prevent all interruptions from happening, you can help determine how long they last. Try all kinds of strategies. Stand up, put a big clock in your work space, tell people you're busy, ask people to bunch things together, and close your door. Consider asking the people who interrupt you the most for their input on how to minimize disturbances.