It was fairly cold this morning (-8C). Finally I figured out how to keep the toes warm enough during my long commute (before, even the Sorel winter boots with warm wool socks were not enough). I cut off the toe part of smartwool socks and used it as a
slip-on cover for the toes, over the normal wool socks (see the picture). Actually,
I had it just on my left foot; my right foot was without the additional cover. The difference was very noticeable. BTW, at least in my case wiggling the toes is not
enough; also wiggling the whole foot (giving the ankle some exercise) helps.

If you're wearing boots and have enough room inside, Toasty Feet insulated insoles are awesome. They really keep your feet heat where it belongs. They're a little thick so I can't get them in my bike shoes, but I can fit them in my Sorels.

the only thing that i've found that keeps my toes warm on my long commutes is slipping some chemical heat warmers in my shoes up by my toes. when i bundle up my feet real nice, my toes are good til about mile 11 or 12, but it's those last several miles where the deep freeze sets in no matter how well they're bundled up. chemical heat warmers to the rescue.

if you have a shorter commute, you may not have to resort to artificial sources of heat.

For the chemical warmers do you put them on top of the toes or underneath?

Not sure if it would make a difference but I always have put them on the bottom. Spent many long cold days in a tree stand that way

do you put them in the sock out out of the sock?

Instructions say outside the sock on the bottom.

https://www.amazon.com/HeatMax-Toasti...5703384&sr=1-2

thanks