Simply being near the garbage can doesn't do the trick? I know that one of the times I spewed forth on Monday came from me going to throw something away, being overpowered by the smell, and immediately feeling nauseous again.
ah well it's an office garbage can at my desk, it doesn't smell!
anyway, i had to go to bankruptcy court this morning for a client and the trustee was like 'amanda, you look a little pale..' and i just giggled and said i had a barf fest. then he gave me cherry flavored stomach medicine before i left which actually worked for about 15 minutes to take the edge off.