For me it works to draw what is constantly on my mind. It could be some thoughts about latest DC movie, a tv series or something going on in the news. Then I try to envision a background for example in case of Ukrain invasion, I am currently thinking of dark grey buildings in the background with smoke and ash falling from sky (scene could be inspired from something else like Chernobyl tv series). Then I introduce some story element since the point of sketch is to tell a story. I'll have a character in the foreground. That character can be sitting alone with a dog or with his/her partner to evoke feeling of tragedy and yet some hope.
In this way the thing which I sketch will be unique. It's hard to draw everything from scratch. So I think of the line from inception movie - never copy entire areas. Copy only small details like a lamp-post or a building or lighting. So I use any reference image to draw that particular detail. Even professional artists do that. Also, I post my work on instagram, this gives a finishing line otherwise I am never happy with what I have drawn.