Is it a matter of decision? Don't you just feel it?

Guess that is when I look back at my day and feel I accomplished something, that's a good day...tho even if I didn't accomplish nothing but found something that made me smile that would be a good day too...

If I fall asleep quickly I know the next morning that I had a good day yesterday

If I make it home alive, uninjured, and with money in my pocket.

Does it burn when I pee?? No? Then I'm all good..

If my wife is on a business trip.

Ha! Just kidding.

But seriously...

By how productive I was plus how I felt throughout the day and at the end of it.

Back at you. How do you decide if you've had a good day

Accomplishment of the set targets without conflicts makes it happen.
:)

If I come home in one piece and got paid

My mood