Although persistence is essential to achieving long-term goals, it is sometimes necessary to let goals go (e.g., when a goal is unattainable, conflicts with other goals, or no longer serves its intended purpose). In everyday life, discontinuing pursuit of a long-term goal may reflect self-regulatory skill, skill deficits, or characteristics of the goal that discourage continued pursuit. In an online longitudinal study, 405 adults (Mage = 36) completed individual difference measures related to self-regulatory skill and reported up to five New Year’s resolutions (M = 2.6), answering questions about each (e.g., commitment, effort, confidence) in January and throughout following the year. They also reported their goal-relevant behavior, their perceived progress, whether they disengaged from the goal and, if so, why. Mixed model analyses suggest that both individual differences (i.e., low self-control, conscientiousness, grit) and goal-specific characteristics (e.g., goal conflict) predict how effectively and how long a resolution is pursued.