Never go to bed early

Part of taking your time is using all the time made available to you. Persona 3 Reload lets you return to your dorm room and sleep, skipping through a block of time to begin the next day. Never do this. If you have an evening, do something with it. Watch a boxing match with Akihiko or study at your desk. The next big plot beat you’re trying to rush to will still be there when you’re done. Use this time to bond with your teammates, raise stats, and buy new equipment and resources.