I never follow this advice.
Im sometimes leading 6-0 or something similar 1st leg in cups and winning the 2nd leg and he will say we are still losing on aggregate.
or our attack are outnumbered by their defence and we can't get through when im leading with my attackers on the score sheet
great advice.
my advice is judge ur own performance and let ur assistant ramble on to himself as he seems to be on drugs in the dugout.