Don't feel bad if you constantly forget where you placed things. There are others like you and I am one of them. I understand how frustrating and how it can really affect your productivity and mood. If you don't want to deal with this kind of negativity in your life, you can just get this Wistiki Tracker. It's an item finder that lets you find things like your keys quickly.
Just attach it to your wallet or bag and you'll have peace of mind. You can even use it as a car tracker when you're bad at parking spaces. You will see its last location on the map and when you're within 300 feet, you can use the hot and cold tracking radar to find your car.
On the other hand, when you know that the item that you're looking for is just in the room, you can trigger the 90dB alarm and you'll find it seconds!
The Wistiki Tracker has been rated with 3.9 stars by Amazon reviewers. According to users, it is easily paired and it's really simple to use. It looks like a flash drive, but it's a little too big for other people's tastes.