To-Do Lists are particularly useful when you have a small number of tasks that you need to complete. However, they can become cumbersome when you have too many items on them, or when you need to progress multiple projects. At this stage, it’s worth starting to use Action Programs, which are designed to manage more complex situations reliably.
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.
All of us think, plan and work differently. A program that works well for a colleague might not work well for you simply because you learn and think in your own way. This is why it’s useful to research and try several different ways of compiling your checklist before deciding on a single system.
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.