I usually run a file or my tire irons before each use, or at least feel for burrs..
.. much like chef , touching up his knives...
then I go to work.. use tire lube.. have had a few tough ones, but done correct it usually goes OK..I am talking steel and mag wheels, nit the midern 17 inchers..
but keep in mind when I had a parts shop, I would change a few 16 inchers a month, mostly cuz they said they were too hard to do and had to use a truck to break the bead. I would do it (by hand) for excercise & beer money.. just to show it can be done..
Its all in the technique.. most new tires going on, I can get on without tire irons...