One thing that has plagued me for years is being nearly crippled after spending the day on my feet working on the house. I would limp for days. Then, one day, I was at Wal Mart and stopped to look at the shoes to see if there were some cheap "throwaways" I could use for painting and saw the TredSafe line of shoes.
Made specifically for the food industry, they are designed for comfort during long periods on one's feet on hard floors. And the bonus is that they are slip resistant.
So, at $20, roughly, I bought a pair.
These things are comfortable! They're real leather, have excellent padding and breath well. They fit great and my feet feel fine when I'm done.
I've been wearing them for several months now for my work projects and even wear them mowing the lawn. Yeah, they're a little cheesy only coming in black, but this has been a Godsend for my feet.
My understanding is that they are only available at Wal Mart, but it's worth a trip down there to get a pair.