The advice here is to pay attention to you. Know what behaviors tend to signal the need for an energy recharge.
When you’ve spotted your tell, and your system needs that recharge, know ahead of time what strategies work best for you.
Knowing what tasks you’re most productive working on at certain times throughout the day helps you make good choices when the choice is yours to make.
Take a break when you need it. But know that taking a break and staying productive are not mutually exclusive. Find a way to make use of your break time.
Find a colleague with whom you can swap for a bit. Ask him or her to give your proposal a read and suggest any adds or edits.