Every morning's fresh start is last night's leftovers in fancier packaging.

This quote suggests that the idea of a 'fresh start' each morning is merely a superficial change rather than a genuine transformation. It implies that the problems and challenges you faced yesterday persist, simply dressed up in the guise of a new day.

The humour comes from the comparison of daily beginnings to leftovers, hinting that despite the veneer of novelty, you're essentially dealing with the same old issues. It's a reminder that even when the day seems new, life's recurring cycles continue, and true changes are harder to come by.