There's bad tired and there's good tired.
The other night I was up until 2.30am.
Got up at 6.30am.
But felt fine.
I'd had a "power" evening of productivity (that makes me feel good) and I was fired up about the upcoming day's events.
Good tired.
Now, there's the non-stop of life's demands, when you're sick, and it's cold, and you have to do the less pleasant things...like taxes.
And you're up late cleaning the house/apartment.
And you wake up in the middle of night and can't sleep.
And don't know why.
Bad Tired.