A couple of weeks ago, I wrote an article explaining the importance of sleep and how to give yourself the best chance of getting proper, restorative rest. The key? Your resting heart rate before bed. You can read that article here: The Ultimate Key to Health: Why Sleep Reigns Supreme.

That article focused on the physical side — how to prepare your body for sleep.

But sometimes, the problem isn’t your body. It’s your brain.

You’ve done all the right things — no late meals, no alcohol, screens off early. But you’re still awake. And your mind is buzzing. Thoughts about work, relationships, errands. A to-do list that won’t stop. Memories that pop up uninvited.

That’s where cognitive shuffling comes in — a simple, playful technique to calm a busy brain.

Also known as Serial Diverse Imagining (SDI), this method was developed by cognitive scientist Dr. Luc Beaudoin in 2014. It’s designed to mimic the kind of mental wandering your brain does naturally when falling asleep — before intrusive thoughts take over.

The idea is simple: pick a neutral word like “apple,” then imagine unrelated, gentle images or words that start with each letter:

A — astronaut

P — pancake

P — paintbrush

L — lighthouse

E — envelope

You don’t have to picture them vividly. Just let your mind float lightly from one to the next. When you run out, start again with a new word.

This randomness is the key. Your brain can’t cling to one train of thought because it keeps being nudged into another. It gently derails the repetitive loops that keep you awake and nudges you into the kind of mental state associated with pre-sleep.

It’s like giving your brain a soft toy to play with — interesting enough to occupy it, but not so engaging that it stays alert.

You don’t need an app. You don’t need perfect technique. All you need is curiosity, and maybe a few go-to words to get you started.

So next time you find yourself staring at the ceiling, instead of fighting your thoughts or forcing sleep, try a shuffle. Pick a word. Let it take you somewhere random and unimportant. And if your mind wanders off-topic? That’s fine too. That’s the goal, really.

Let your brain meander. Let it drift. And let sleep catch you along the way.