Okay, first buckle your seatbelt because this will be long. As an author that had the same obstacle as you have now, I empathize with you so much that I will share all my secrets. (Don't tell anybody else LOL!)
So here are my tips that worked for me;
1.) Make lists, MANY LISTS. Flowcharts of your story, list of characters with their role plus backgrounds also their descriptions, lists of possible lines you could use that just pops out of your mind in times inappropriate, etc. Make sure to organize it. It's okay if it's an organized mess. Mine is like that too, as long as I know where that particular thing is written then all is safe.
2.) Outline your story. This, I always do. The best way to start is to know how it ends. By doing this, you can connect all the important points you made at the beginning to your end, and minimize plotholes. Which will be noticed by your readers, no matter what genre you write.
3.) Look for inspiration. When I write action scenes, I listen to songs that have more bass. When I write a sad chapter, I watch pets dying because that always makes me cry. (Don't judge me. I am perfectly insane. I meant, sane. Tehe!) Look for things that get you in the mood to write the feelings needed to be expressed in your chapter.
4.) Aim to finish the book, not the chapter. Every chapter I write, I always think about the whole book in its entirety. What does this mean, you ask? Well, it means that one chapter is not just a chapter for this scene to happen, or that scenes to happen BUT for this scene to happen BECAUSE of this previous or soon to happen scenes. You create the chapter with a reason and a purpose. This will lessen filler chapters, which I try to eliminate from my work. But if you like that then go ahead and ignore me. (I am so redundant with the word scene. I fail as an author. (ToT))
5.) Write because you are free to do it not because your readers are pressuring you. BUT BE RESPONSIBLE too. I know how bad it feels to be pressured to write this, to make this, to finish this, to answer that, and blablablah. Your readers will always want more updates, so calm down and breathe. Write it calmly and don't try to overthink of the criticism.
6.) TRY to think as you are your own character. I do this a lot. My story involves an orphan girl, so I think about things like, 'If I was an orphan without any love, what would I do?' In acting, we call this method acting. They become the role they are tasked to be. In writing, well, I don't know what it is called, but I call this Empathy. LOL.
7.) REST. If nothing comes to your mind, take a break, have a KitKat. LOL. Enter your zen, organize your thoughts, and relax. If I ever have writer's block, I yoga it out then meditate about my story from the beginning to the end without any machines that cause me to be blind from radiation. Find the activity that makes you calm. Maybe listening to music, perhaps?
8.) Take my advice with a grain of salt. You are the author, and not all authors are the same. We think and feel differently so my techniques may not work with you just as some may find my advice useful, so DO YOU, Dude/Dudette.
You can unfasten your seatbelt now.
Thank you! Happy writing!