I have a wireless mouse and keyboard combination that uses a USB dongle like this:
This is at a desk that I share with other people, so it is important that when I (or others) leave and take my laptop, the dongle stays put. However, it is so small that often I forget to take it out of my laptop and leave it on the desk. I'm not worried about it being stolen -- just forgotten.
I thought of trying to superglue a key ring or something to it, in order to make it more conspicuous, but wondered if others have dealt with this?