I wish I had something new and inovative, but I use the same as listed above...newsletter hospital and volunteer, brochure (had printed by outside source), plasic stands with insert (I place in waiting rooms for a week or two every month or so), in house email system, website, in house TV sceens (public areas), current volutneers in placements and I go to every retirement party hosted by the hospital. I have a few departments within the hospital that do mass mailings for a variety of different things, so I place a brochure in the mailing as well.
Which of the above provides the most success? My current volunteers, volunteering in their placements. I would say a min of monthly they phone me to their area or bring someone to me who has an interest or they have chatted volunteering at our hospital up:)