The consumer cooling-off habit that reliably reduces impulse regret is to wait a set period (e.g., 48 hours) before finalizing large purchases. Cooling-off windows force a pause that weakens the urgency-driven portion of decision-making. This is not a legal cooling-off right (those exist only in some contexts and jurisdictions), but a behavioral tactic you impose on yourself to resist marketing urgency. During the waiting period you can check alternatives, compare prices, and consider returns policy and long-term need. Often the emotional spike that fueled the desire fades and you either proceed with a clearer mind or avoid a regrettable purchase entirely. The 48-hour rule is short enough to keep you in the game for genuine limited-time deals yet long enough to cool impulse.

Make it practical by building a routine: add desired items to a 'consider' list (not the cart) and set a reminder for 48 hours later. Use the time to run quick checks: price comparison, reviews, and return conditions. If you still want the item after the delay, buy with confidence; if not, congratulate yourself on avoiding a likely regret. For recurring categories where impulse is common (gadgets, fast-fashion, hobby kits), increase the cooling-off period or set a monthly spending cap. The goal is simple: turn reflex into choice.