I tried EVERYTHING under the sun (even prescription meds), but the only thing that worked in the end was an OTC sleeping tablet called Restavit. It wasn't a complete cure, but certainly improved things. Did make me a bit sleepy, but that was worth feeling better! I used to take 1/2 in the morning, 1/2 at about 2pm and 1 at bedtime. As I got better I cut the dose down to 1/4 of a tablet when I just was feeling a bit icky.
My GP recommended Restavit as well. That with a B6 tablet. I think she mentioned to me that it's what helped her with her MS.

Other than that...
A salty cracker 5-10minutes before I get out of bed helped. (I never leave without a baggie of jatz - on the bus I sit and nibble on them)
Frozen raspberry/coke was one of the few 'fluids' I could keep down (and kept me out of hospital for dehydration).
Plain rice with mixed veggies was something else I could stomach.
Barley sugars or sour drops helped when I was trying to find something 'substantial' to eat.
Everything else just made me sick...

I found ginger (the ginger bears, tea, ale, tablets) made me feel sick, as did stemetil (an antinausea med I have used in the past - Cat C though so it was recommended when I wasn't keeping fluids down).

I am still a little nauseated now (I'm at 10 weeks now) but the vomiting has drastically reduced...