Conscientiousness and neuroticism, self-management practices, and perceived situational constraints were integrated into a model that predicts efficacy and performance. The model was tested using structural equation modeling with a sample of 228 undergraduate students. The results indicated that individual differences exist in self-management practices and perceptions of situational constraints, and that both self-management practices and perceived situational constraints have partial mediating effects on the relationship of personality to self-efficacy and performance.