If you've ever had a lot of momentum and energy and motivation to get something done, only to be usurped by other things, you know exactly what I mean. Yesterday started with the greatest of anticipation, but by noon had fizzled to wistful thinking. I finally had the time to pick up my crochet hook in the evening, but by that time all the energy had waned.
I grew up a Navy brat, and therefore tend to plan and schedule my time. I used to look at interruptions as major inconveniences. At some point I realized that some things just weren't meant to be, shrug it off, and move on. Get the mundane tasks accomplished - they won't go away by themselves. The trick seems to be rekindling the fire of energy you had before the interruption. Sometimes that takes the form of a good night's sleep.
Not every day will be productive. Life has a tendency to throw obstacles in the way. It's how these obstacles are overcome that provide life experience and shape the future.