I have a strange problem and I was thinking there must be other people who've encountered it. Basically, there seems to be some sort of invisible wall in my writing where my stories always end up at 30k words give or take a couple of thousand. I think it's down to planning, because I usually write 'by the seat of my pants' with only a one page rough plot for reference. So I guess what I'm really asking is how can I learn to fill the space in between my ideas with actual words? I've tried to plan more in-depth, but I lose motivation because I love the part of imagining things on the fly.