Every single moment matters. There is never a time where the phrase, "I'll just do this now because it is inconsequential and won't have any effect on me or my progression" is even valid. It is important for us to appreciate every small thing. The difference between being 1st place and 100th place in the Olympic 100 meter dash is only a fraction of a second. Happiness or Despair hang in a moment's time.
Our God is aware of us at every moment of time, day and night. He knows our needs and we would be wise to come to know our own needs as well; for it will humble us, make us aware of our ultimate dependencey on Him, and allow our Father in Heaven to work miracles within us (Ether 12:27). Look around you and see The Creator's hand in everything around you. Don't take for granted the small moments that govern who we are. By "small and simple things are great things brought to pass; and small means in many instances doth confound the wise" (Alma 37:6).
Trillions of molecules make up a beautiful rainbow. So also do many small actions make up who we are. With the Lord's help, we can become the most beautiful masterpiece
"Moments that Matter Most" Mormon Messages Video: