My process boils down to:

Constantly ogle real-world coastlines as if they were porn. Notice the way a bay curves, the way rivers break up a smooth curve, the way islands fragment away in tandem with the fall of mountain ranges and ... anyway, as if they're porn.
Because they are porn.

...

...

I'm sorry. I forgot what I was saying. Something about coastl ---

I'll be in my bunk.