Key Principle
The entire Tiny Habits system compresses into two maxims: help people do what they already want to do, and help people feel successful. Every design heuristic, troubleshooting sequence, and decision rule in the book is a downstream application of these two statements.
Why This Matters
Without collected heuristics, practitioners default to intuition -- and intuition about behavior change is systematically wrong. People instinctively reach for motivation first (the least reliable lever), pick "should" behaviors instead of "want" behaviors, skip celebration because it feels silly, and blame character when habits fail. Rules of thumb short-circuit these errors by giving fast, memorizable decision rules that encode the book's causal model.
The Maxims
Fogg Maxim #1: "Help people do what they already want to do." (Chapter 2) Motivation for "should" behaviors is externally imposed and unreliable. Motivation for "want" behaviors is intrinsic and self-sustaining. Selecting want-behaviors at the design stage embeds motivation structurally rather than bolting it on later. "You can't get yourself to do what you don't want to do. At least not reliably." (Chapter 2). This maxim governs behavior selection -- if a candidate behavior violates it, no amount of prompt or ability engineering will produce a durable habit.
Fogg Maxim #2: "Help people feel successful." (Chapter 7, Conclusion) Emotions -- not repetition -- wire habits. Products and personal designs that create feelings of success thrive; those that make people feel clumsy or guilty get abandoned. This maxim governs the entire emotional architecture of habit formation: celebration, Shine, and the neurochemical encoding loop. Together with Maxim #1, it functions as a two-question filter to evaluate any program, product, or self-designed habit before investing effort. (Appendixes)
Design Heuristics
Behavior Selection
- Match, don't manufacture. Use Focus Mapping (impact then feasibility) to find Golden Behaviors. Never pick a behavior and then try to build motivation for it. (Chapter 2)
- "Can I get myself to do this?" -- the single feasibility question that collapses Motivation and Ability into one gut-check. A "pop of dread" means it is a should; excitement means it is a want. (Chapter 2)
- Design for Real-You, not Fantasy-You. A Golden Behavior must survive your worst day -- "even when we are at our most hurried, unmotivated, and beautifully imperfect." (Chapter 2)
- One-time actions count. Installing blackout shades is as valid as a daily habit. People overlook high-impact one-time actions when they think "habit change." (Chapter 2)
Making It Tiny
- Start absurdly small. Two pushups, floss one tooth, three breaths. Tiny behaviors bypass motivation's unreliability by eliminating time, risk, and motivational demand simultaneously. (Introduction, Chapter 3)
- Use Starter Steps or Scale Back. A Starter Step is the first small move that creates momentum. Scaling Back shrinks a full behavior to its minimal version. Both keep the behavior below the motivation threshold. (Chapter 3)
- "Simplicity changes behavior." Ability is the most reliable lever in B=MAP. When in doubt, make it easier before trying to make it more motivating. (Introduction)
- "Show me exactly what to do." Vague instructions inflate perceived difficulty. Demonstration collapses the gap between objective and perceived effort. (Chapter 2)
Prompts
- No prompt, no behavior. Regardless of motivation or ability, a missing prompt means the behavior will not happen. (Chapter 4)
- Action Prompts beat all others. Person Prompts (memory) are unreliable; Context Prompts (alarms) desensitize. Anchoring to existing routines is the most durable prompt type. (Chapter 4)
- Use the Trailing Edge. The last specific action in an existing routine is the precise trigger point for the new behavior. (Chapter 4)
- Pearl Habits transform irritants. Negative moments can become anchors for positive behaviors, converting friction into fuel. (Chapter 4)
Celebration
- Celebrate immediately. The positive emotion right after the behavior is what wires it into the brain. Delayed rewards (a massage next week) are incentives, not rewards -- they cannot build the neurochemical bridge. (Chapter 5, Chapter 7)
- "Emotions create habits. Not repetition. Not frequency. Not fairy dust. Emotions." (Chapter 7)
- Intensity and immediacy determine encoding speed. A single intensely positive experience can create an instant habit ("one and done"). Thousands of neutral repetitions may wire nothing. (Chapter 7)
- Celebration compounds. Individual celebrations strengthen specific habits; accumulated celebrations build generalized self-efficacy -- "fertilizing the entire habit garden." (Chapter 7)
- Rehearse the full sequence. The Rehearsal Technique (7-10 rapid repetitions of anchor + tiny behavior + celebration) supercharges wiring in a single session. (Chapter 5)
Troubleshooting
- Diagnose in strict order: Prompt -> Ability -> Motivation. Prompt and ability fixes are cheaper, more stable, and less likely to regress. "Fussing around with motivation is the last step." (Chapter 2)
- No "lazy" axis exists. When a behavior fails, diagnose which B=MAP component is missing. Self-blame terminates experimentation; design thinking invites iteration. "It's a model, not a referendum on character." (Chapter 2)
- Treat your life as a change lab. Failed habits are data, not verdicts. "I want you to treat your life as your own personal 'change lab' -- a place to experiment with the person you want to be." (Chapter 2)
- If a behavior cannot generate positive emotion, drop it. A habit that produces guilt or frustration cannot wire in through celebration and should be replaced, not forced. (Chapter 2)
Bad Habits
- Untangle, don't break. Decompose a general bad habit into 15+ specific sub-habits. Start with the easiest -- "That's like trying to untangle the tightest snarl deep inside a big knot." (Chapter 7)
- Prompt interventions: Remove > Avoid > Ignore. Removing the prompt is a one-time fix. Ignoring relies on willpower, the least durable option. (Chapter 7)
- Increase friction, not guilt. Invert the Ability Chain: add time, cost, physical effort, mental effort, or routine conflict. Environmental redesign persists after motivation fades. (Chapter 7)
- Motivation adjustment is the last resort. Reduce upstream drives (Option A) rather than adding demotivators (Option B). "If this was a winning plan, then very few people would have bad habits." (Chapter 7)
- Scale back ambition rather than quit. When total elimination triggers resistance, reduce scope along four dimensions: shorter period, reduced duration, fewer instances, lower intensity. (Chapter 7)
- Swap habits only after prompt and ability work. The replacement must be both easier and more motivating than the old habit. Celebrate the swap immediately -- Shine is not optional. (Chapter 7)
Groups
- Segment by motivation x ability. Dolphins (high both), Turtles (high motivation, low ability), Crabs (low motivation, high ability), Clams (low both). Target interventions accordingly. (Chapter 8)
- Shared method = shared language = reduced friction. Groups trained in the same model outperform solo changers because shared vocabulary eliminates negotiation cost. (Conclusion)
- Both maxims function as ethical guardrails. If a design violates either maxim, it has shifted from helping to manipulating. (Appendixes)
Key Quotes
"It's a design flaw -- not a personal flaw." (Introduction)
"simplicity changes behavior" (Introduction)
"Help people do what they already want to do." (Chapter 2)
"Help people feel successful." (Chapter 7)
"Notice that fussing around with motivation is the last step in the troubleshooting order." (Chapter 2)
"Emotions create habits. Not repetition. Not frequency. Not fairy dust. Emotions." (Chapter 7)
"We change best by feeling good, not by feeling bad." (Chapter 7)
"When you are designing for habit formation -- for yourself or for someone else -- you are really designing for emotions." (Chapter 7)
Related References
- b-map-model: The universal backbone (B=MAP) that all heuristics operationalize
- focus-mapping: The systematic selection process behind "match, don't manufacture"
- celebration-and-shine: The full emotional encoding mechanism behind Maxim #2
- troubleshooting-protocol: Extended walkthrough of the Prompt -> Ability -> Motivation sequence
- bad-habits-masterplan: The three-phase algorithm for untangling unwanted behaviors