Ditch the cotton, and go with poly pro liners, and then wool.  You won't have cold feet..

Use well insulated boots with ample wiggle room.
Use Merino wool socks.

That will get you through most cold days. When it's below zero, you may need the liners or the warmers. Depends on your tolerance for cold.

I will be looking for some wool socks.  If it makes my feet warmer then I am all for it.  To me if my feet are warm, the rest of my body is warm.  I just wanted to share a trick I have learned that works for me.  I have learned a lot on hunting forums and wanted to share the idea.  I like them because they are light and warm.  I hate walking in big bulky boots so this fixed both issues at one time.

I tried anti persperent on the feet,wool socks and pretty much everything you all have mentioned and none of them worked for me.

What I have found is that the more socks or whatever I wear the more they sweat and then the cold sets in.Antipersperent made it worse.

All I wear now is a pair of tennis shoes and 1 pair of socks.For me cold toes are apart of cold weather hunting.I actually have gotten used to it and it doesn't bother me anymore.

Its about training the Mitochondria in the body.

Good ideas. I have the sweat thing too. I have not tried the anti-persperant yet but heard of it. Another thing to try is putting bags over your feet going in with your knee boots. Take them off, change socks, put the socks in the bags to contain scent. Put fresh socks on and wear your still sweat-less dry knee highs back on.

Ill echo what Mark Baker said.  Sock liners under smartwool socks is the best way ive found to keep my feet warm.  I have poor circulation due to breaking a couple bones in my feet so they are the first thing to get cold.  I started wearing both pairs  when I was younger to keep my feet warm in the winter while fishing for rockfish in virginia and maryland during december.  This has translated well to hunting and did a good job through all the snow we had this year.  I also have a set of wool liners to add to my boots when it gets really cold.  Also, if you are having blister problems breaking in a new pair of boots, the liner socks will help that too.  I always used them when I was breaking in a new set of cleats when playing sports.

Good Hunting