Plus, you can still move your writing progress forward because there are easier parts of your story you can work on now till you feel up to tackling the tougher parts.
When I have a long story or research report to write, I divide the work into sections. Every section has a title to quickly explain its purpose. And for those sections I have reasonably finished for the first draft, I change the text color to blue.
Then periodically, I hold down the CTRL key and scroll down with my mouse to reduce the size of each page so I can see the whole document in one view. Seeing blocks of black text steadily turn to blue is a great motivator that says, "Way to go, tiger. You're making progress!"
One of America's greatest writers (and patriots), Ralph Waldo Emerson, talked about writer's block in his 1841 essay on the Intellect:
For example, a man explores the basis of civil government. Let him intend his mind without respite, without rest, in one direction. His best heed long time avails him nothing. Yet thoughts are flitting before him.
We all but apprehend, we dimly forebode the truth. We say, I will walk abroad, and the truth will take form and clearness to me. We go forth, but cannot find it.
It seems as if we needed only the stillness and composed attitude of the library to seize the thought. But we come in, and are as far from it as at first.
Then, in a moment, and unannounced, the truth appears. A certain, wandering light appears, and is the distinction, the principle, we wanted.
But the oracle comes, because we had previously laid siege to the shrine."
That's a good idea.
“...so I can see the whole document in one view”
Thanks for reminding me! Another good method of writer’s flow, is to write in “book view.” I use LibreOffice, which has a book view option, where there’s 2 pages, as in an open book. That way I’m aware it’s already a book and I’m just filling it in. :)
If you’re inclined to pay for software I believe Microsoft Word will do the same trick.
Also, decide whether you’re a pantser or a plotter. Possibly your expectations don’t line up with your inclinations. On the other hand, some pantsers need a bit more discipline, and some plotters need to loosen up.
Sometimes you just need a coach or an encouraging book. I recommend “Book In A Month” by Victoria Lynn Schmidt. I’ve read a dozen others, but that one tops my list.
Best youtube coach: Derek Murphy. (From among several dozen I have viewed.) Murphy’s outlining videos will get your mind right in no time.