If you spend a lot of time with your hymnal, you deserve a way cool personal hymnal marker.
I made a collection of little charms from microscope slides. Trace around the slide on some snazzy paper. Put together tiny collages on the paper and cut them out. Sandwich them between two ordinary microscope slides. Wrap them with copper tape. Solder them together and add jumprings.
Actually, if you don't solder, you could just use beads, or make your collages on blank wooden dominos, or use whatever your personal art form might be. I happen to make these slide charms, so I like to use them.
Next, buy a ready-made chatelaine in the needlework section of your local arts and crafts tore. A chatelaine has a central piece and five or so arms -- enough for three hymns and the "amen." Now you simply attach your charms to the chatelaine, and your hymnal marker is ready!
It;s easy to make special ones for different seasons, or to make them as gifts. Do you have someone really special in your choir who really deserves one?