In one illustrative example disclosed, a guitar pick holder is made of a thin, flat, and visually-appealing flexible synthetic layer of material which adheres to a front outside surface of a guitar. The flexible synthetic layer of material is sufficiently plasticized such that its front outer surface provides a clinging hold to guitar picks made of, for example, celluloid or nylon. The guitar pick is held against the front surface of the flexible synthetic layer of material and is thereby carried with the guitar, even when it is subject to relatively strong forces of accelerative motion (i.e. when the guitar is physically handled or shaken).