To use your checklist, simply work your way through it in order, dealing with the A priority tasks first, then the Bs, then the Cs, and so on. As you complete tasks, tick them off or strike them through.
One of the biggest advantages to using a software-based approach to manage your to do checklist is that you can update it easily. For example, instead of scratching off tasks and rewriting the list every day, software allows you to move and prioritize tasks quickly.
Mark the importance of the task next to it, with a priority from A (very important) to F (unimportant). Redraft the list into this order of importance. Then carry out the jobs at the top of the list first. These are the most important, most beneficial tasks to complete. You can also use software-based approaches to manage your checklist. You can often access these from anywhere, and they can often be synced with your Smartphone or PDA.
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.