"St. James Infirmary" is a good one. "Satisfied Mind" is also an excellent choice. Mabye Woody's "So Long, It's Been Good To Know Yuh" (with new verses, I suppose).

Just last week I wrote a song touhcing on this very topic.
The song is called "Green Lake Road."
You can listen to it in .mp3 format at my site, Smokin' Bill's Digital Depot. I'm fairly new at songwriting, so I'd appreciate any feedback from the esteemed likes of all ye Mudcatters.