In all you do, make it intentional. 
If you are waiting in the doctor's office - use that time. Don't waste it thinking that you are wasting it.
You can never, ever, get that moment back.
If you can‘t relax, do something active like making a list, checking through your appointment book, or cleaning those extra things out of your purse or wallet. Read a book, strike up a conversation with a future client. If all else seems impossible - just spend your time THINKING.
This does not mean you can never relax and take it easy. It means pay attention to the moments you are relaxing. If it is relaxing in the doctor's waiting room, do it deliberately. If you are relaxing on the beach, do it deliberately, and be in that moment. Allow yourself the pleasure... Enjoy it to the fullest!
That moment can never be replaced, so focus! Whether it's your son or daughter asking a question, or your spouse telling you what their day was like... Focus. Savor that moment.
Working, playing, relaxing... Be intentional & focus.
Never waste precious time. You cannot live that moment over again.

Photo by Lynn Afton All Rights Reserved 2008
I find myself reminding Me of this very thing when stuck in traffic. Use the time to enjoy the music, listen to an educational tape/cd, or take the time for some good brainstorming. (Ok, even a phone call). There isn't any sense in getting upset!
Thanks for your reminder. I hope I remember it when I need to.
And I don't think I welcomed you to ActiveRain - WELCOME! And nice to 'meet' you!