You may try to get through your to-do list each day, and often things slip through -- but that doesn't mean you've failed. On those days, look to see if you met your personal values checklist.
Instead of looking at what you didn't get done on your list, Inc gives a few tips on how to evaluate your day. If you stayed true to your values, instead of your task list, maybe the day was productive after all:
Reflect on the day, all of the things you did, and try to identify which of your personal qualities you used the most. Acknowledge this quality. When you acknowledge your positive attributes you use them more, and this in turn makes you feel better about yourself and your life overall.
Those attributes might be the reason you didn't get everything done you intended. This alternative view isn't an excuse for procrastination, of course. Not getting everything done on the list was a deliberate choice to postpone something because something else had priority. Hit the link for other reasons why you might not get everything done, but still have a great day.