This dynamic raises a persistent question for anyone trying to improve their well-being: What actually happens when we want to ditch some of our unhealthy habits for healthier ones, and where do we even begin? How can individuals finally move past the perennial mindset of "I’ll start tomorrow"? To understand why lasting behavioral change is so elusive, researchers and behavioral scientists suggest examining the deep-seated mechanisms that govern human routine.
Habits Are Complicated
To understand why breaking a routine is rarely as simple as an exercise in sheer willpower, it helps to look at how behavioral science defines the concept. The American Psychological Association (APA) defines a habit as "a well-learned behavior or automatic sequence of behaviors that is relatively situation-specific and over time has become motorically reflexive and independent of motivational or cognitive influence—that is, it is performed with little or no conscious intent."
This definition offers a clear inkling of the complexities involved in attempting to rewrite daily routines. Habits become deeply ingrained and remarkably strong when individuals operate within a stable, consistent environment. Because the environment acts as an anchor for these automatic behaviors, behavioral experts frequently suggest that anyone attempting to change a habit should first try to alter their surrounding environment to make the desired transition easier.
Public health programs and policy initiatives around the world have demonstrated the occasional success of this environmental approach. For instance, some school districts have achieved notable success by replacing soda vending machines with readily available, accessible water. Similarly, municipal governments have worked to encourage active lifestyles by constructing expanded bicycle networks, implementing strict advertising restrictions on tobacco products, and introducing taxation measures on alcohol. On a larger scale, public health campaigns like those implemented in Japan have even utilized waistline measurements and targeted corporate initiatives to combat metabolic syndrome, demonstrating that structural and environmental shifts can significantly influence population-level health behaviors.
Habits Often Start With a Cue
Those large-scale programs show success because many of our habitual behaviors and daily choices do not occur in a vacuum; rather, they happen in direct response to environmental cues. In his bestselling book Atomic Habits, author James Clear notes that a habit typically begins with a cue, which then triggers a craving. That craving subsequently produces a behavioral response that the brain perceives as a reward, effectively reinforcing the habit loop. In theory, change the cue and you can change the response. But a major hurdle arises when the cue itself is not obvious or easily identifiable.
Human environments are heavily layered with cues, many of which are exceptionally difficult to control or entirely escape notice. These invisible triggers include socioeconomic status, educational background, family structures, broader social cultures, mental health status, personal genetics, the immediate food environment, and pervasive advertising campaigns promoting ultra-processed or unhealthy foods.
Furthermore, as noted by the APA, many of these cues bring about an action that is performed with little to no conscious intent. In other words, the combination of our complex modern environment and our nearly unconscious, reflexive responses to it makes sorting out what specifically triggers a given habit a formidable challenge.
Even when individuals possess specific, well-defined goals and conscious intentions, those goals are frequently subsumed and neutralized by the surrounding cues. A person might start the week with a firm intention to cut back on wine or beer, only to find themselves later in a social situation where alcohol consumption is the ambient norm and expected behavior. People can easily lose sight of their long-term health goals when they are constantly tossed around in a sea of environmental cues that do not support those objectives.
Other Barriers to Habit Change
Beyond environmental cues, deeper emotional needs can also drive and sustain a habit. According to Clear, some of our everyday choices serve psychological functions, such as reducing underlying anxiety, winning social approval from peers, or achieving a sense of status in the eyes of those around us. Because these emotional drivers operate beneath the surface, they can be exceptionally difficult, if not impossible, for individuals to identify on their own.
Meanwhile, author Jeremy Dean explores another common pitfall in his book Making Habits, Breaking Habits, noting that people routinely succumb to what he terms the "planning fallacy." Individuals consistently assume that changing a particular habit will be significantly easier and faster than it actually is in practice. When inevitable difficulties, setbacks, and frustrations ensue, the initial intent to change the habit often dissolves entirely.
Another potential trap is the temptation to change too much at once. If individuals attempt to reshape their entire lifestyle overnight—or even alter a significant portion of it simultaneously—the strategy is highly likely to backfire. For example, deciding to adopt a rigid diet that represents a drastic, radical departure from one’s usual relationship with food may yield temporary results, but such extreme shifts almost always prove to be unsustainable over the long term.
Choosing a Habit to Change
Given all of the psychological, environmental, and behavioral hurdles involved, how can a person choose a habit to change in a way that maximizes their chances of long-term success?
Understanding the mechanics behind automatic behaviors provides valuable insight. Habit change is undeniably a difficult, intricate process, but it is also a deeply rewarding one. By acknowledging and working directly with the inherent difficulties of human psychology and environmental influence, individuals can design more realistic adjustments that ultimately lead to better health outcomes.
Rather than relying purely on motivation—which fluctuates—or attempting sweeping life overhauls, experts suggest that a nuanced, patient approach to navigating cues and managing expectations remains the most reliable path forward.
