When you do use checklist effectively, you’ll be much better organized, and you’ll be much more reliable. You’ll experience less stress, safe in the knowledge that you haven’t forgotten anything important. More than this, if you prioritize intelligently, you’ll focus your time and energy on high value activities, which will mean that you’re more productive, and more valuable to your team.
By keeping such a checklist, you make sure that your tasks are written down all in one place so you do not forget anything important. And by prioritizing tasks, you plan the order in which you’ll do them, so that you can tell what needs your immediate attention, and what you can leave until later.
But in you’re in an operational role, or if tasks are large or dependent on too many other people, then it may be better to focus on a longer-term checklist, and "chip away" at it day-by-day. Many people find it helpful to spend, say, 10 minutes at the end of the day, organizing tasks on their list for the next day.
You may find it easier to compile several checklists (covering personal, study, and workplace, for example). Try different approaches and use the best for your own situation.