Preggie Pops helped me. I tried not to have more than 2 a day because they are a bit expensive. I also didn't like all the flavors.
25mg of B6 three times a day helped intermittently.
I eventually got a prescription for generic Zofran; it took the edge off but I was still nauseous at times.
For me, I haven't found anything that completely gets rid of nausea.
Note: Crackers didn't help me at all!