All of the above options can be effective strategies for managing time effectively. Developing a study plan helps create a structured schedule, allowing you to allocate specific blocks of time for different tasks. Writing a summary helps consolidate and comprehend information more efficiently. Taking notes helps enhance understanding and retention of information. Lastly, studying every spare minute refers to making use of any free time you have throughout the day to review material or engage in productive activities. It is beneficial to incorporate a combination of these strategies based on personal preferences and learning style.