How to stop my constant foot pain?

I have to walk to work, and its a pretty long commute. Then when i get there I have to stand around all day, then walk back home. After all this my feet are usually in agonizing pain, Ive tried getting very comfortable shoes, and they don't seem to help. I don't wanna start taking pain killers on a regular basis either. Is there anything that can quell my constant foot pain?