I've had many days when I'll have a little burst of energy, only to quickly wind down in the evening.
Dishes remain unwashed in the sink. That load of laundry I told myself I would do is still sitting in the hamper. Some of the mail is still sitting on the kitchen table. I didn't sweep the kitchen floor, etc., etc.
I'm just too out of energy to make any progress!
I'll bet some of you can relate!
At times like that, I remind myself, "Tomorrow's another day." (And sure enough, none of that work has gone away by the next day).