Notations are things you make to remind you to do something, or on papers you want to keep to help you remember why you wanted to keep them in the first place.
As you age they become more important, for every thing you do.
If you think of what you will do today as you get out of bed, note it.
And, no, you will not remember it by the time you go get pad and pen. Keep one by your bedside.
Writers do this all the time. They have a pad with them all the time.
Agers need them there, also. A pad for all occasions.
If you want to remember to come back here and check out tomorrow's post...make a note.
Okay, maybe not these notes.