I’ve discovered something that might be important.
If you write a few words on a Post-it note and stick it to the windowsill next to your desk, the ink will eventually fade and it will become totally illegible. At this point the only sensible course of action will be to throw it away. But you will be unable to bring yourself to do so. Just in case its mute presence might still assist you in reconstructing the memory of whatever was once significant enough to have been written on it.
This is what happens when you don’t get round to things. I guess everybody else knew that already.
Use permanent ink.