I briefly mentioned worry beads in an article I wrote about the Bead Museum of Washington DC. Worry beads as the name implies are strung in a specific manner and then used by sliding them through your fingers. This repetitive task is used to calm the mind.
Got an email from Fire Mountain Gems yesterday - they're got instructions up on their site to make komboloi worry beads. These beads are Greek in origin and are made from amber beads.
Fire Mountain Gems based their design on beads found in the Komboloi Museum in Nafplio, Greece. It's design idea #8712 on their website.
Here's the link to the instructions using amber and sterling silver beads. Looks like a very easy and inexpensive project.