In the professional world, checklists are a huge component to the daily work of pilots and surgeons. Detailed step-by-step checklists help fight complacency in the cockpit, and maintain safe operation of the aircraft during all phases of flight, from gate to gate. In hospitals, medical teams use checklists to ensure surgical procedures go smoothly.
Or, imagine you’re in a sales role and have a long list of people who you need to talk to. You write out a checklist of everyone you need to call and every client you need to see, and start prioritizing.
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.
Run through these checklists allocating priorities from A (very important, or very urgent) to F (unimportant, or not at all urgent). If too many tasks have a high priority, run through the list again and demote the less important ones. Once you have done this, rewrite the list in priority order.