Methods I've used in varying combinations depending on temperature:

1. Plastic bags ("Baggies") over my toes, inside the shoes. Works pretty well to simply keep the wind out if it's not TOO cold.

2. Disposable sticky toe warmers - about $1.50 / pair from sporting goods stores in the hunting department. They work GREAT as long as they stay dry, i.e. neither moist from sweat nor from rain. In *pretty* cold weather, I wear a pair of thin hiking liner socks, then the sticky toe warmers, then another pair of thin or midweight socks. This gets kinda bulky, so usually when it's cold enough for the toe warmers I wear my mtb shoes - which as you mention are roomier than my road shoes.

3. I have a pair of wind/waterproof socks, which sounded neat but I don't like - again, too constricting - their largest size doesn't seem to fit my size 11 feet.

4. In rainy+cold weather, my best solution has been road shoes + neoprene shoe covers, +/- the toe warmers. I like the thicker zippered covers rather than the thin "aero" things - again, sometimes hard to find a size large enough to not be too constricting.


J.W.