The title says it all... I need something to use instead of a shoehorn.
I tried a spoon but this does not work well.
Inspired by this post, I tried using some cardboard from a box of pasta. It worked pretty well. I don't think it will last forever, but there is plenty more cardboard produced through normal purchases.
I think a box of macaroni might work best based on the width; something around 3-4 inches is ideal.
In general most items which are reasonable flat and narrow can be used as replacements for a shoehorn. Items like rulers, a suitable stick, large wooden spoons, or similar items. If you are in a real pinch, you could use other kitchen utensils, like pie cutter, sausage tongs. Anything long and flat could do.
On an alternative approach, you could try using your belt. It is not as sturdy, but usually they are easily found and accessible. Just insert the belt end into the shoe, and use as normal.
After you finish your yogurt (or pint of ice cream), cut the plastic container vertically into a medium-wide strip and trim off the bottom. Bend the strip lengthwise to fit into the heel of the shoe.
A dollar-bill sized strip of polypropylene (PP) will lay flat on a closet shelf patiently waiting for your next application. It will fit into your hip pocket, wallet, or bag. It works wet or dry, and can be used for other things that a bobby pin can't. It's one of a few great MacGyvers* to have with you.
*MacGyver is a different kind of hero: he doesn't use weapons, he's afraid of heights, and he's an expert at making complicated machines out of ordinary things quickly. http://www.tv.com/shows/macgyver/
B"H Hey, I'm new here and have been using a Credit Card as a shoe-horn for years. I just came online to see where I can share the info... and did a search - and this thread came up. A credit card works like a GEM as a shoe horn. Just make sure to position in on the inside corner of your shoe/foot. In lieu of a CC - for not-so-tight shoes - use a regular business card. Best, - Chayim