Reviving an old thread:

I just used an old leather toe strap to help me mount a clincher tire. I wrapped the strap around the tire and rim so that my mounting didn't slip past a point. I used a Kool Stop Tire Jack™ to lift the last of the tire bead into the well.

I recently bought a few Voilé (rubber? silicone?) straps for general purpose, and now I realize that nothing beats a toe strap. And the woven nylon straps are absolutely not as good as leather. Though Voilé straps come in various lengths.