As a startup founder, how do you manage & structure your random thoughts?

When random thoughts come to me—usually while traveling, waiting, or even bathing—I quickly note them down. I either type them in my own WhatsApp chat, record a voice note, or use the Notes app widget on my phone. Later, I review these notes (usually once or twice a week). If a thought needs action, I add it to my task management app, ClickUp, along with a doc link, and then start working on it.