Outlines sometimes get a bad rap for being rigid, but for me, they're the only way I avoid writing myself into a corner. I used to be a total pantser, and my stories would always stall around chapter fifteen. The middle was a muddy slog because I didn't know where I was going. Creating a scene-by-scene outline, even a loose one, forced me to ask where the energy peaks and valleys were.
It's like seeing the whole rollercoaster track. You can spot if you have three huge action scenes in a row—that's exhausting for a reader. So you can space them out, insert a quiet character moment of reflection or a flashback for depth in between. For character development, the outline lets me map the emotional arc alongside the plot. I note down not just 'Character A discovers the secret,' but 'Character A reacts with denial here, leading to a confrontation with Character B in the next chapter.' It ties their internal change directly to external events, so neither feels random.