Get some perspective
If I need to gain a fresh take on my work-inprogress, I simply flip the image. I do this regularly because it gives me a fresh look at the illustration, especially if I’m working on the same element for hours. I encourage you to do the same because it’s also a useful way to spot any mistakes and quickly correct them. You’ll find the command in the Image menu>Image Rotation>Flip Canvas Horizontal, or you can use the Ctrl+T shortcut.