Effective study techniques for retaining vast amounts of information include using active learning methods like summarizing, teaching others, and employing visual aids like mind maps. Spaced repetition is another powerful technique, allowing material to be reviewed at increasing intervals. Practice tests can reinforce learning by creating an exam-like context. Additionally, breaking information into smaller, manageable chunks helps enhance memory retention. Associating new information with existing knowledge can create mental connections that make recall easier. Regularly revising and engaging with the material creatively can significantly boost long-term retention.