The Brain-Healthy Reason You Should Make Checklists, From Neurologists

How do you keep track of your to-do's? Do you have a calendar, a collage of sticky notes, or do you simply scrawl down a list? 

Technically, it's not the actual list-making that's so stellar for brain health—it's isolating your tasks, from beginning to end, and physically (or mentally) checking them off. You see, the Sherzais are not huge fans of multitasking: "We say there's no such thing as multitasking; it's doing multiple things badly," says Dean. Attention and cognitive decline are deeply intertwined (your attention naturally depletes as you age), and when you multitask, your attention becomes further compromised, which creates a perfect storm for cognitive decline. 

Research has also found unfinished goals can cause intrusive thoughts during unrelated tasks—when participants were unable to finish a warm-up activity, they performed worse on an unrelated brainstorming task. Meaning, if you leave a task unfinished, it may continue to swirl in your mind and actually affect the quality of your other work.

That's why, says Dean, it's important to "break each activity into their own silos and [perform] each act from beginning to end." One way to keep your individual tasks accountable? A handy checklist. 

Plus, Dean notes, crossing off a task once it's done provides an incredible dopamine surge for your brain. When you accomplish a goal—no matter how small—your brain rewards you with a pleasurable hit of dopamine; in other words, there's a reason a tiny checkmark on your to-do lists gives you so much satisfaction. "Your joy, your sense of happiness over time, even your depression scale1—all of that's going to be affected by those check-offs," says Dean.