These are the must-do items that deserve a gold star on your to-do list. As a concept, P1 is something you cannot forget while dealing with the bigger picture. If your P1 is to get a project done, understanding different aspects of the project already becomes P2 . Because P1 is to GET IT DONE! Understand later, make notes and move on. Tackling P1s first keeps them at the top of your project game and avoids any last-minute scrambles.
Multiple P1
Deal with a single P1 at any given time. P1 should never be stacked unless in an emergency situation.