Behavior Change

May 2026

• May 16, 2026IdeasUnderstanding Habit Stacking for Lasting RoutinesHow to attach a new behavior to one that already runs automatically. The formula is after I do X, I will do Y, which replaces a general intention with a specific trigger. Lally's team at UCL followed 96 volunteers and found a 66-day average to reach automaticity, with a range of 18 to 254 days. The widely repeated 21-day claim traces to Maxwell Maltz's 1960 book on patients adjusting to facial surgery and has no experimental support.18 MIN5.1k

April 2026

• Apr 15, 2026IdeasWhy Your Morning Routine Fails (And What Actually Works)Routines collapse by design rather than by weak character. The common faults are building against your chronotype, installing too many new behaviors at once, depending on motivation, and stacking the whole thing on insufficient sleep. Roughly 25 percent of adults have late chronotypes. The minimum viable routine is three things: a consistent wake time within 30 minutes daily, water on waking, and light exposure in the first hour.16 MIN3.9k
• Apr 14, 2026IdeasAtomic Habits Cheat Sheet: James Clear's Method SimplifiedThe 21-day figure has no empirical basis and traces to a 1960 plastic surgery book by Maxwell Maltz, whose patients took about that long to adjust to a changed appearance. The honest framing of the book helps too: the Four Laws distill work by Fogg, Wood, Lally and Gollwitzer, and the choice of four stages is pedagogical rather than empirical. Wood's finding that roughly 43 percent of daily behavior is habitual is what makes environment design the real lever.15 MIN2.8k
• Apr 13, 2026IdeasThe 2-Minute Rule That Changed Millions of LivesDavid Allen's Getting Things Done put the rule in the clarify stage: if an item takes under two minutes, the overhead of tracking it exceeds the cost of doing it now. James Clear redirected it at habits, scaling a behavior down until it is crossable on a bad day, with the identity rather than the outcome as the point. The most common way it fails is scaling up too fast: one page on day one, two pages on day two, a chapter on day three, stopped entirely by day ten.15 MIN1.2k

February 2026

• Feb 5, 2026ConceptsWhy Measurement Changes BehaviorMeasurement is an intervention, not neutral observation. The article works through four mechanisms (attention, accountability, feedback, signaling) and the laws formalizing them: Goodhart's observation that targeting a monetary aggregate broke its relationship with inflation, and Campbell's Law on corruption pressure. Wells Fargo rewarding products per customer produced roughly 3.5 million fraudulent accounts while the goal itself was undermined.20 MIN65.8k

January 2026

• Jan 25, 2026ConceptsWhy Intentions Do Not Predict ActionsSheeran's review of 422 studies put the average intention-behavior correlation at r = 0.47, leaving roughly 78% of behavior to other causes, and one physical activity study found 77% intending to exercise against 35% doing it. The page then covers what works instead: if-then implementation intentions, which raised goal achievement about 54% across 94 studies, environmental friction, commitment devices, and habit timelines.19 MIN56.1k

August 2024

• Aug 18, 2024ExplainersWhy Diets Fail and What Works: The Science of Weight LossHall measured resting metabolic rates in fourteen contestants six years after the show and found them suppressed by an average of 499 calories per day below prediction for their current size. Covers the hormonal counter-response of falling leptin and rising ghrelin, Hall's inpatient trial where ultra-processed food drove 508 extra calories a day at matched macronutrients, and what GLP-1 drugs change.16 MIN8.5k

February 2024

• Feb 27, 2024ConceptsChronic Procrastination in Highly Motivated PeopleKnowing exactly what you need to do and being unable to start is not laziness. Laziness is indifference to effort; procrastination is a war between intention and action, which is why nobody stops just by knowing better or intending harder. Hyperbolic discounting explains the preference reversal: we plan to start next week, then next week arrives and we again prefer the immediate relief of avoidance.19 MIN2.8k
• Feb 25, 2024ConceptsWhy Motivation Fades and How to Revive ItAmabile and Kramer found even small wins lifted the next day's engagement, which suggests motivation follows action rather than preceding it. The page pairs this with Schultz's recording work, where dopamine neurons shifted their firing from the reward to the cue that predicted it, so an activity that becomes fully predictable stops producing the signal that drives approach.15 MIN1.6k

January 2024

• Jan 5, 2024ConceptsBuilding Better Habits: Science of Sustained ChangeThorndike changed no menu and ran no campaign, which is the point: the behavior shifted with nobody deciding to be healthier. The page uses that to argue willpower targets the wrong system, then gives the tools that work with the automatic one, including implementation intentions that roughly double follow-through by naming the cue, habit stacking onto something already reliable, and friction that works whatever your motivation.16 MIN9.8k

December 2023

• Dec 31, 2023ConceptsHow Habits Form and Change: Neuroscience Behind BehaviorSurgery in 1953 removed Henry Molaison's hippocampus and stopped his seizures, but he could no longer form new memories. Taught to trace a star in a mirror, he improved session after session while having no memory of ever doing it: his motor cortex and basal ganglia kept what his hippocampus could not. Habits are not memories but compiled programs, and acquiring one shifts control from prefrontal cortex to basal ganglia.13 MIN13.4k

November 2023

• Nov 14, 2023ConceptsInsights on the Effectiveness of WillpowerHagger's pre-registered multi-site replication produced results consistent with chance variation around zero, and the marshmallow test did not survive either: with roughly 900 children and controls for socioeconomic background, the link to later outcomes largely disappeared. What does hold up is Galla and Duckworth's finding that disciplined people encounter fewer temptations rather than resisting more.13 MIN13.1k

December 2022

• Dec 25, 2022ConceptsThe Habit Loop: How Habits Are Formed and ChangedGraybiel's maze experiments showed the same handoff in behavior, with activity moving out of the cortex into the basal ganglia and firing concentrated at the two endpoints while the middle gets chunked into one automatic unit. That encoding resists extinction, which is why Duhigg argues you replace a habit rather than erase it: keep the cue and the reward, change only the routine.22 MIN11.4k

November 2022

• Nov 4, 2022TechnologyBehavioral Design: Creating Products That Change HabitsHow behavioral design works and what the core model claims. BJ Fogg's model, formalized in a 2009 conference paper, holds that behavior occurs only when motivation, ability and a prompt are present simultaneously, which is why making a behavior smaller and easier is usually more reliable than trying to raise motivation. Oulasvirta and colleagues documented in 2012 how phone use becomes habitual checking triggered by external prompts rather than conscious intent.15 MIN7.8k

August 2022

• Aug 10, 2022ConceptsWhat Science Reveals About WillpowerWhat the willpower research actually supports after the replication crisis. Baumeister's 1998 ego depletion model was replicated dozens of times, but Hagger and colleagues ran a pre-registered multisite study in 2016 with 2,141 participants across 23 laboratories using the same protocol and found no significant effect. The current best estimate is a modest phenomenon whose magnitude was substantially inflated by publication bias in the early literature.15 MIN8.5k

July 2022

• Jul 21, 2022ConceptsWhat Is the Basal Ganglia: Your Brain's Habit MachineAnn Graybiel's rats learning a T-maze showed striatal activity starting out diffuse, then concentrating at the beginning and end of the sequence as the middle became automatic. Forming a new habit does not delete the old pathway, it only quiets it, which is why a strong cue can reactivate it years later. Lally's research found automaticity took 66 days on average, ranging from 18 to 254, with no universal shortcut.14 MIN4.4k