This document summarizes 5 factors that affect language learning strategies: motivation, learning styles, experiences in studying, proficiency level, and gender. Motivation was found to be a major predictor of strategy use, with more motivated learners using strategies more frequently. Learning style also impacted strategy use, such as extroverts preferring social strategies and introverts using metacognitive strategies more. Learners' experiences studying abroad and length of time studying a language affected their strategy choices. Proficiency level correlated with different strategy use, with more advanced learners using metacognitive strategies more. Gender differences were also seen in strategy preferences.