"Adding a new key to a keyring is almost always a pain. Separating that tiny metal with your fingernails never works as well as you want it to and usually ends with a pinched finger or dropped key. To forgo these pains, Reddit user RuncibleSpoon18 suggests the easiest way to get a key on a keyring is to use a staple remover. The idea is really simple. Staple removers have the nice, thin teeth that easily slide between the rings of a keyring. When you chomp them down, it spreads the ring apart and makes it easy to roll a new key through. This saves you the hassle of trying to pry open the ring with your bare hands."
- Me
from Bookmarklet