Every January, millions attempt to radically alter their diet, exercise for ninety minutes daily, and read thirty pages every evening simultaneously. By February, almost all have abandoned these regimens.
Human behavior is intimately bound to environment and habit friction. If an action requires high friction, it drains your finite willpower. When workload or family stress spikes, high-friction habits are the first to collapse.
Sustainable change requires stacking new micro-behaviors onto existing stable routines. If you already brew coffee every morning, attach three minutes of mobility stretching to that exact coffee ritual.
Additionally, design your environment so good choices are convenient and detrimental choices are inconvenient. Keep fresh fruit in clear sight and place your smartphone in another room while sleeping.
Small changes that survive rough days will always outperform monumental changes that require perfect conditions.