Now this is a gadget I can get behind.
I actually found this a few months ago while looking for storage solutions in my 1950s home. I love my house but it could use a few more closets, ya'll.
It's called the Cabidor (get it... cabinet + door) and it just attaches to your door hinges. There is a small plate that you have to screw into your door and that attracts a magnet on your cabidor -- meaning, the cabidor stays shut.
Anyway, my personal thought is that if you need more storage, you should consider this. You can usually find a good deal on this at Costco and these cabinets come in different sizes. I have two -- one in my bathroom and one in a spare bedroom!