The pantyhose ties that I made earlier this year are working well. I only needed to stake a few of my tomatoes this year. (Yay for sturdy stems!) Last year I had to stake them all.
This is what the pantyhose looks like in action:
Its a really simple trick that is working great so far. Its not damaging the stem, its not coming untied, its free, and its making use out of someone else’s trash.