In U.S. offices, there is a rule when delivering documents and other items to someone:

"Put the really important stuff on the chair (not on the desk)."

It is easy to overlook things on the desk. But if it is on the chair, you will always pick it up when you sit down, so you can be sure that it will reach that person. This is a good idea, isn't it?

I think a similarly good idea is the "Do Not Disturb" sign. You can hang it on the door of a hotel when you don't want to be woken up. If you hang it somewhere else, it might be overlooked, but if it is on the doorknob, you will always see it when you try to open the door. This mechanism prevents people from opening the door accidentally.

Unforgettable Door Hanger" is a memo that uses this mechanism. By writing down what you need to do on it, you will always see it when you leave the room, so you will never forget to do something.

Unforgettable Door Hanger, a memo to be hung on a doorknob
Unforgettable Door Hanger, a memo to be hung on a doorknob

The Unforgettable Door Hanger is described on the sales website as follows

The sales website describes the Unforgettable Door Hanger as follows: "This note can be used on any door in any room. On the kitchen door, you can write down the groceries you need so you don't forget to buy them. On the front door, you can note utility payments that are due, etc., so you won't forget to go out and pay the bill."

A pack of milk, onions, cabbage, and bread!
A pack of milk, onions, cabbage, and bread!

The author often forgets to return DVDs/CDs he "borrowed" online. I often come to the mailbox and realize that I left the DVD in my room, and I am disappointed. So I bought "Unforgettable Door Hanger" and every morning before I go out, I ask myself, "Did I put the DVD in my bag?" I want to ask myself, "Did I put the DVD in my bag? If I do this, I may not forget to return the DVD.

I was disappointed when I didn't find the DVD in my bag....
I was disappointed when I didn't find the DVD in my bag....

By the way, if you often panic when you leave your room in the morning, "I can't find my room key! When you leave your room in the morning, do you often panic because you can't find your room key? For such people, "Doorganizer" is available. This is an item that you put your keys and other items that you always take with you when you go out, and hang it on the doorknob. With this item, you will never lose your keys in your room, and you will be able to go out smoothly.

Doorganizer" to remember what to take with you when you go out
Doorganizer" to remember what to take with you when you go out

Priced at $9.99 for the Unforgettable Door Hanger and $14.99 for the Doorganizer at the Animi Causa mail order site. Shipping is free.

Color variations of "Doorganizer" You can choose your favorite color to match the color of your door.
Color variations of "Doorganizer" You can choose your favorite color to match the color of your door.