There's nothing like those powerful words, "This doesn't matter." Those are disheartening, disempowering words. They aren't the truth though. God uses everything. In the hands of a faithful God, nothing is wasted. NOTHING.
If the enemy can steal your motivation and hope, then he doesn't have to defeat you. You defeat yourself. I may even venture to say there's a whole enemy team called "self-defeat" that may be out to devour whoever's susceptible.
So whatever you do today, know this: It matters. You matter. What you do matters. How you love matters. Your words, your acts of service, your unloading the dishwasher, your taking the carpool to school, your picking up dry-cleaning, your random no-reason hug to your spouse...these micro-decisions make up the stuff of life. They matter. They count. Even if your inner critic says they don't.
Get out of bed. Take a breath. Write the song. Give the compliment. Thank the clerk. Choose the smile. Take the nap. Pet the dog. Love your children. Listen to a piece of music that moves you. Open up your hands to God. Let Him have whatever it is you have or don't have today. Be steadfast, immovable, always abounding in the work of the Lord...not because God desperately needs you to get stuff done, but because your toil is not in vain when it's laid down at His feet.