A Mnemonic device is something that helps a person remember something.
Most of us probably learned some of those in school.
One example is "I before E except after C or when followed by G as in neighbor or weigh."
As we get older our brains gather more and more information, so it becomes easier to forget things.
I've developed a few mnemonic devices of my own.
For example, I used to keep my medications on the windowsill over the sink and I'd move them from one side to the other after taking them. That way I'd be sure I'd done so.
I'll put library books I've finished reading in a different location than the unread ones so I don't forget to return them.
I keep a big whiteboard in my office and write my daily to-do lists on it, then check off the things I've accomplished.
And, of course, I often write notes to myself and put them where I know I'll see them.
What do you do to help yourself remember things?