For the ginger/peppermint enthusiasts:
Altoids are great for both, because they actually have the real ginger or peppermint in them, rather than artificial flavorings.
I just drink a big glass of water, lukewarm.
Peppermint and ginger are the best for nausia. Even if you chew a few pieces of peppermint gum... that usually works. For next day hangover nausia, I chew a few pieces, spit them out when the flavor is gone, and keep chewing till I go through the whole pack! I don't usually have altoids, but they do work great for nausia.