I’ve used several writing prompts over the years to help get things going. Here’s where they’re all collected together for easy perusing.
A-Z collections – I’ve used the alphabet A-Z as a way to prompt for a couple of settings, the Old Crown and FATEPunk.
RPGaDay prompts – Collections from 2018, 2019 and 2020.
Twenty Questions – a tool I borrowed to help flesh out my various homebrew settings.