Do you slip a nap in when you need it and does it help?
Since my job entails presenting to a virtual audience many times a week, being on my game is critical to a successful delivery. Rather than taking a break for lunch I'll slip in a 20 minute nap to recharge my batteries and get my head cleared. Personally I find it extremely beneficial, far more than a cup of coffee or 5-hour Energy, in getting my energy level back up to normal. I use a timer on my phone called Ovo (Android) that can be set by voice. A quick, "20 Minutes" out loud and the timer is off and running. Once the alarm goes off I'm back up and running and ready for my next session. Once in a day is enough and it's not every day so only when it's needed is when I take the mental reset.
If we have the opportunity to do this, especially for those of us in creative jobs, why shouldn't we?