MokouFriedChicken True!!! Even for me, I write what i have in mind first. Even if that doesn't make any sense, but, as long that the idea is related to the chapter, i will write it. I keep writing until a paragraph is born. Then, i repeat the step, not caring about any grammar problems.
After that, i will start the process of editing. Rewrite, and checking it again. After i posted the chapter, i will read it again as a reader. Only then, will i see my mistakes that i never realized before. Then, i will keep editing it from time to time.
Editing our chapters even though you have already posted it is a good way for us to find our mistake, sticking to the plot, we also won't forget about our own plot because we keep reading the chapter, again and again. It also help keep the motivation going.
For the motivation problem, Pinterest is a good application for us writer to get our motivation back. I've done this a lot and it's working. There are many interesting idea inside, the cool arts, writing prompt , dialogue prompt, skill, fighting and more.
Listening to music also helps a lot. I love to listen to sad song to cry. Then, when i cry and feeling sad, i tried to think of a future plot where i kill someone(inside novel). If i listen to heroic song, i tried to think of when my character will become a hero that save the word, or they are going to war.
I want to recommend a few good singer or dj for motivation purpose.
-SVRCINA
-Besomorph
-Miia
-Hidden Cirizen
-Neoni
-Bahari
These are all just my opinion though. You can use your favourite song too.