Folkandroots: I think it would depend on the organiser, but, generally, I've heard/know of myspace being used, C.D.s being sent, requests following singarounds/competitions, airplay, someone putting in a good word...but, going by your nickname, maybe you could add to this for us...

Davetnova - software/IT Certificate; hardware/iPro Certificate; and I never mentioned a "computer based job" (you) but "which should be helpful to my prospects in a number of spheres" (me).