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.
Recently, The Art of Manliness provided an historical look at checklists, along with a detailed primer in deciding which lists will work for you, culled from the excellent, The Checklist Manifesto. You can implement the same routine in your daily work to help give you a greater shot at success.
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.