This is very easy and all you need is a paperclip and a bead!
Step 1: Bending the Paperclip
I would recommend doing it with pliers, it makes it so much easier! Basically, bend it so it comfortably fits on your finger. I usally bend it twice around. Cut off extra paperclip.
Step 2: Add the Bead
Add the bead to the bent paperclip wire. You may need to untwist the wire to get it on.Test if the bead falls off. It shouldn't. Make sure it still fits comfortably, and your done!