I have a pair of La Sportiva Wildcats that fit great, but are just a bit tough to get on. The heel collapses every time and then I do that frustrating shoe wiggle, eventually settling for crushing my finger as the acceptable solution to keep the heel up as I put the shoe on.
I had been eyeing the Big Dig as a trowel AND a tent stake, so I got one. When it came it hit me, use it as a shoe horn! This has worked wonderfully.