Even without instruments, I will start singing a song to myself making up words about how I need a ride and seem to get picked up pretty quick. I think the appearance of me talking to myself is eased by the the purity of intention or something... and the power of music compels!i just hitched down the 101 too, from coos bay to san francisco. the two kids i was travelling with had a banjo and a washboard and every time we were waiting for a ride, they would just set up and play. we got rides so quickly, i felt bad that i was just holding the sign, but i think we looked like such bumpkins people assumed we were harmless =)
"anywhere but here" has always worked rather well