A number of years ago now I attend an event where we learned how to make an abacus bracelet. The idea was that it would help you keep count for any crochet or knitting projects you were working on. I had been wanting to make another one, so finally one day I decided to attempt to reverse engineer the bracelet I did have. I made two of them. One was for myself, using just some pretty blue beads and the other one was for a birthday present for a friend, using Harry Potter Hufflepuff House colours.
The reason I say this is a teaser tutorial is because I haven't actually written the tutorial yet, but it is one of the many tutorials I have floating around in my brain and one day will get written about.