When you try to do multiple things at once, you are not actually multitasking. You are rapidly switching between tasks. Each switch costs you time and mental energy. Your attention fragments, and nothing gets your full care.
Choose one task. Give it your complete attention. Close everything else. Put away distractions. Work on this one thing until it is done or until you reach a natural stopping point. Then, and only then, move to the next task.
This is not about working harder. It is about working with less distraction. When you give a task your full attention, you can work more efficiently. You make fewer mistakes. You think more clearly. The task gets done better and faster than it would with divided attention.
Notice how different this feels. When you are fully present with one task, time can feel different. You might enter a state of flow. The work becomes more satisfying. You are not constantly pulled away. You are just here, doing this one thing well.
Try it today. Pick one task. Close everything else. Work on it with full attention. Notice how much more effective you are when you are not splitting your focus. Single task focus is not a limitation. It is a way of working that honors both the task and your attention.