I was just talking to my father-in-law about the seeds we each started this weekend. He told me of this method that the old-timers in the family used to start tomato seeds. This would date back to about the Great Depression era, but I imagine it would still work. In fact, he is testing it out this season, so I'll be sure to update later. It sounds very credible to me. Those old-timers really did know a thing or two about gardening.
1) Go out into the forest. Look near the base of old firs or other trees that haven't been disturbed in a long, long time.