One way to find insight is to resist the temptation to have a miscellaneous bucket.
As soon as you label your buckets (your files, your Trello categories, the things you spend money or time on) you will discover that you can find miscellaneous things that belong in those categories. And once connected, the seemingly irrelevant bits of your life or your thinking start to take shape.
The junk drawer is the enemy of understanding.
When we name things, we begin to understand them. The world around you isn't as random as it appears at first blush, and the art of noticing is often as simple as getting good at naming.
Defining categories is tricky, filling them out is easy. And surprisingly effective.