Time is measurable. We all have the same 24 hours a day, yet not everyone manages his or her time effectively. Your ability to manage your time well is a key ingredient to your success in school, work, and life in general. There are five basic rules for good time management: Use a calendar / appointment book. It's is a simple, sound investment. Always be on time. Being late makes you look inconsiderate and unprofessional. Be sure that the first hour of your work is productive. It often sets the tone for the rest of your day. Learn how long it takes for you to complete certain tasks and then give yourself that amount of time. This skill takes practice; don't worry if it's difficult at first. Know your internal clock. It's the mechanism inside you that gives you different levels of energy during the day. Are you a night owl? When are you most productive?