There’s always something that can be improved.
Which means there’s never going to be a time when the work will be “done.”
Understand this and remember to do just what you can today. And when you’ve done what you can within the confines of your allotted time for work that day—and this is the important part—leave the rest for tomorrow.
Go home, rest, invest time with friends and family, decompress, explore hobbies, and create art… go and do what you need to do so you can return to work the next day recharged and ready.
Better that than trying to fix it all immediately and having nothing left give the next day—especially when there are countless days of work yet ahead.