The writing muscle is one that needs to be exercised regularly and occasionally it needs a bit of help to develop. I definitely use a few supplementary aids to help out. The ones below all relate to me but they might still work for you.
Music. For me, this is the biggest one. I, for one, certainly work much more effectively when I have scene-appropriate music filling my ears. Between the understated but powerful piano for sad scenes, upbeat, lyric-filled pop for more cheery or funny scenes and exciting, fast rock and metal for action, there is a wide variety of genres and types you can fit to each of your scenes.
Environment. I tend to write in places that have a positive or free atmosphere but I also tend to move. When I write at school, I find that sitting under the shadow of tall trees gives me some sort of boost, the oxygen giving my brain something to work with. At home there’s a workroom or study I sit in when I want to get down to business but most of my writing comes from sitting in my bedroom under a blanket or two. One’s state of mind is very important when writing.
Journals. The writing muscle is one that needs to be exercised regularly and there’s no better light exercise than journal writing. If you get the more distracting thoughts out of your head in the form of a diary entry, or even think of something good while you’re there, you’re going to end up with something of decent quality.
Breaks. I cannot overstate the importance of breaks. Much as many videogames encourage you to take a break every hour or so, I’d recommend the same for writing. Taking the time to clear your head and breathe with definitely increase the quality and clarity of your thoughts and writing, which is what you want, really. Put the pen down, make some tea and just rest for a bit.
I don’t know what works for you, but these definitely help me when I work. Thanks for reading and enjoy your day.