We can hold a maximum of seven things in our head +/- 2

But, when thoughts are connected together, a pattern is formed. The brain is a pattern-finding machine. This makes things easier to remember.

To the brain, there is no different between a done item and a written down item. This is the true power of writing things down.

The little things will destroy our mind if we let them. The call you have to make, the tissues you have to get from the store, that friend to respond to. Write. It. Down. Or these little things will build and tug away from your focus. This relates to the Hemingway Bridge effect, with the next steps written down we can get them out of our mind