Grace had tried to build a morning routine for three years. She’d built pieces of it — the walk, the journaling, the breathing practice — but never all of them together and never consistently. One would stick while another fell away. Two would survive the week but not the weekend. All three would last exactly as long as the motivation that had inspired them — which was, typically, about ten days.
She was 32. She worked in marketing research. Her professional life involved designing systems for other people’s behaviour change — understanding why consumers did what they did, and how to make desired behaviours more likely. She knew, in professional detail, how habit formation worked. And she still couldn’t build one for herself.
The solution, when she found it, came from her own professional toolkit: habit stacking. She’d recommended it to clients for years. She’d never applied it to herself.
What Habit Stacking Is — and Why It Works
Habit stacking is a behaviour change technique derived from what psychologists call “implementation intentions” — the practice of specifying not just what you will do, but when, where, and in response to what trigger. The formula is simple: “After I [CURRENT HABIT], I will [NEW HABIT].”
James Clear describes this technique as one of the most powerful in the atomic habits framework because it eliminates the most cognitively expensive part of habit formation: the decision to start. When a new behaviour is anchored to an existing one, the established behaviour acts as an automatic cue. You don’t need to remember, motivate yourself, or choose. You simply do the new behaviour next — because the existing behaviour has already happened.
The neuroscience behind this is grounded in what psychologist BJ Fogg calls “motivation waves” — the insight that motivation fluctuates constantly and is therefore an unreliable foundation for behaviour. Environment design and sequencing are more reliable. If the new behaviour is always prompted by an existing behaviour, it doesn’t require motivation. It requires only that the existing behaviour occurs — which, because it’s already established, it will.
How Grace Built Her Mental Fitness Stack
Grace’s process was methodical. She began by mapping her existing daily anchors — the behaviours she performed automatically, every day, without fail. They were:
- Making morning coffee
- Sitting down at her desk
- Eating lunch
- Washing her face at night
- Getting into bed
Against each anchor, she attached one small new mental fitness practice. Not because these were the “best” practices — but because they were matched to moments that already existed in her day, reducing the activation energy required to perform them to approximately zero.
The Stack She Built
After I make morning coffee → I stand outside for 5 minutes with my mug.
This delivered Huberman’s morning light exposure. The coffee was the cue. The 5 minutes was small enough never to feel like a burden. Grace had not once chosen to skip it, because skipping it would have meant standing in the kitchen instead — and the outside felt better. The environment itself reinforced the choice.
After I sit at my desk → I write today’s single priority.
One sentence. “Today, I need to finish [X].” This took 30 seconds. It functioned as a cognitive anchor for the day — reducing task-switching and keeping her focus oriented toward the thing that mattered most. Aligned with James Clear’s “two-minute rule” for new habits: never let the new behaviour take longer than two minutes in its initial form.
After I eat lunch → I walk for 10 minutes without my phone.
This delivered midday movement, which research consistently shows improves afternoon cognitive performance. The phone-free rule was deliberate: those 10 minutes were her only guaranteed quiet of the working day, and filling them with content undermined their restorative function. Martin Seligman’s PERMA research identifies “positive emotion” as a wellbeing pillar — and 10 minutes of uninterrupted outdoor walking reliably produced it.
After I wash my face → I write three sentences in my journal.
Not a full journaling practice. Three sentences. What happened today, one thing I’m grateful for, one thing I’m releasing before sleep. The face-washing routine was so automatic that the journal, placed next to the sink, became equally automatic within two weeks.
After I get into bed → I do 5 minutes of reading from a physical book.
This replaced phone scrolling in the final minutes before sleep — a behaviour change that is simultaneously a habit addition and a harmful habit removal. The physical book sat on her bedside table. The location made the new behaviour easier than the old one. Over time, she found herself reading for longer without effort, because the anchor worked.
The Stack as a System
Individually, none of these practices is revolutionary. What makes them powerful is their architecture: they are locked into Grace’s existing day at moments that require no additional decision-making. On her lowest-energy days — the ones where motivation is entirely absent — the stack still runs. Because it doesn’t need motivation. It only needs the cue.
After four months, Grace’s morning light exposure, daily priority-setting, midday walk, evening journal, and reading practice were as automatic as brushing her teeth. She described the experience of having built them not as discipline, but as having finally understood that discipline isn’t the point. Friction is the point. The lowest-friction path is where behaviour goes. She’d designed the lowest-friction path to be the path she wanted to be on.
For more on building lasting mental fitness practices, see our Build Habits hub and our posts on cognitive performance habits for busy people and evening routines that support recovery.
Build Your Stack This Week
- List your 4–5 daily non-negotiable behaviours. The things you do every day without fail. These are your anchors.
- Identify the one new habit you most want to build. Reduce it to its smallest possible form (under 2 minutes).
- Attach it to one anchor. “After I [anchor], I will [tiny habit].” Start with one stack only. Get that one consistent before adding another.
- Design the environment to support it. The journal next to the sink. The shoes by the door. The book on the pillow. Lowest friction wins.
🔁 Ready to build a mental fitness stack of your own?
The free 7-Day Mental Edge Challenge is structured entirely as a stackable daily practice — designed so each day’s action anchors to the one before it. Seven days. A system for life.
This content is for informational purposes only and is not a substitute for professional mental health advice.