Knitting class: pen and notepad

I have heard knitters say, "Have sticky notes on hand while knitting. This way you can stick reminder notes on your knitting."
This sounds like a wise idea.
However, what happens if the notes fall off.
Admittedly I am careless. If you are more cautious than I this method may work fine for you.
However, if not you may find my tragedy useful.
I always ensure that I have a pen and notepad in my knitting bag. This way I can take notes while I am knitting.
Exactly where am I in the pattern? I just flip to that page.
You will no doubt find a hundred reasons you are happy to have pen and notepad at hand.
Happy knitting