Forgot to add to BYU's note on the orthotics.
If you've any type of funny foot, these are life savers. I've a really high instep and if I ski without them, my feet are screaming for the fire dept. after 30 min.
If you're anywhere near a good ski area, or a good outfitting store for hiking, backpacking, climbing, etc., you should have no trouble finding a custom made orthotic.
They do it while you're there, hour at the most, some sort of mixture that forms to your feet under a vacuum.
There are variations as to length, thickness, flexibility, etc. all dependent upon what type of shoe/boot---tennis, ski boot, dress shoe, mountain boot, work boot, etc.
Once you get them, go find some boots. Just don't forget to break your feet in with them as well as the boots b4 long hike. They'll remind you of some muscles you forgot about.