That's when you need to go back to basics. You need your tools to see you through.
Those unwavering project management go-to's that have seen and will see the project manager through the darkest of times (ok, ok, a tad dramatic, but you get where I'm going...).
It's the check-lists, the Gantts, the daily stand-ups, the status reports, the call outtakes, the budget reporting...I could go on.
Those are the foundations of the work that will enable you to deliver to the highest standard.
Does you use them as standard? If not, why not??
Having those items in your itinerary will simply enable you to do the job better - not reinvent the wheel every time, not be thrown off course by the next email that hits you.
Rely on your tools and they will see you through.
Yes, I could have just put those weights down and given up - but today I didn't. I went through. I just wish the reward wasn't the DOMS waiting for me tomorrow...