Of all of the mental models on the list, this one might be the most familiar and one that you’ve used the most often. How often have you used checklists in your life? More importantly, how often have you ignored using a checklist (like running to the grocery store “for a few things”) and ended up wishing you had?

There are a huge variety of checklists you could create, but they often filter into three main buckets.



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Mickey Mellen

I’m a cofounder of @GreenMellen, and I’m into WordPress, blogging and seo. Love my two girls, gadgets, Google Earth, and I try to run when I can.