A couple of months ago, I wrote a short post in my personal blog entitled You Choose How People Interact with You.  In this post, I cover a process that will train the people around you to respect your time and honor your requests.   

Stage One - HEALTHY

• Honor - Benefit of Choice
• "Can you do this for me please ________ by this time on this day?"

Stage Two - WE MIGHT HAVE AN ISSUE

• Lost Honor - No longer a request, it is now an expectation
• "Produce the result or give me an explanation of why the task wasn't completed"

Stage Three - THIS IS THE ISSUE

• Face-to-Face - And you don't want to have more than a couple of step three face-to-face conversations with me
• "This is the issue - what is your take on it? - and this is what needs to happen for us to move forward" 

This process is easy to implement, and it will lead to healthier and more productive relationships.