What is the best way to memorize information quickly?

The most effective method is active recall combined with spaced repetition. Instead of passively rereading material, test yourself on it repeatedly, forcing your brain to retrieve the information. Apps like Anki use algorithms to show you cards at optimal intervals before you forget them, making this highly efficient. Beyond that, connect new information to things you already know, since your brain retains meaning better than isolated facts. The elaborative interrogation technique, asking yourself "why" and "how" something works, deepens encoding. Teaching the material to someone else, even imaginary, also forces you to identify gaps. Short, focused study sessions beat long marathon sessions because fatigue sharply reduces retention.