We writers have seen those posts, the authors that write 1,000 to 3,500 words a day before breakfast, etc.
Such words haunt when we stare at a blank screen, our minds totally devoid of words and thoughts. Aimlessly clicking onto sites isn't working. Neither is coffee, a walk, music, etc.
In those times, write three paragraphs.
When the muse is sluggish, an entire chapter, even 500 words, is daunting. But three paragraphs is like hitting snoze on an alarm. Eventually, the body gives up and does what it's supposed to do. The mind is like that, too.
Three paragraphs of something is totally doable. And when you write them, one of two things will happen.
Creativity will spark and ideas will overflow faster than you can type them.
Or you will be three paragraphs ahead.
It's totally a win-win.