Cold weather biking gloves and stuff

Lobster Claw gloves. Lets the fingers warm each other up.

Neoprene shoe covers (the full-foot kind), wool socks, and probably a half-size bigger shoe.

So far the warmest hand solution for me has been skiing mittens.   Mittens far surpass gloves and the kind for skiing are great.  In fact, too warm.   If you're too manly for mittens, then try a lobster claw style.   Our bike shops have many options for different temps.   Actually, for 30 degrees my suggestion of the ski mittens is overkill.

I continue to struggle with cold feet, so good luck!  Wool socks are superior, but there are many combos of toe covers, etc, to try.   Up here in "real" winter conditions, i.e. below freezing and snow, I know a lot of folks with Lake winter cycling boots.  Again, probably overkill, but you WILL be warm.

Windproof stuff

I like Pearl Izumi AmFib as windblock and my choice of cold weather gear. I don't wear plastic bags (tried it) but my feet get sweat and then get cold. I go with smart wool socks, bike shoes and AmFib shoe covers. I have a pair of winter riding boots that I need to swap to MTB pedals.

I like my Pearl Izumi AmFib gloves as well.

Jacket my favorite is Gore Bike Wear...blocks wind and then wear layers underneath.

Any set of Windstopper gloves. I've hand the lobster claws but if it is that cold regular ski gloves work fine.

I have had every combo imaginable for feet... neoprene socks, "Seal skins" windprooff socks, fleece.

Nothing really works. The problem isn't insulation, it's circulation. Hans and feet are the first to go from poor circulation on a bike. You just don't notice it in Summer except when they go numb. You have to have loose stuff. don't get any glove that is tight. And for feet... as was mentioned... the neoprene shoe covers are the best. All those bulky socks stuffed in bike shoes just cuts off more blood. That is unless you want to buy a bigger shoe and then very few make a winter one.