With my first it was only morning sickness in the morning so what'd i'd do is stay up late every night so that I could sleep in until almost noon. If I did that I would totally skip the morning sickness (not sure how or why, but hey it worked!).
With my second it was all day and night sickness so one thing was the prenatal vitamins only made it worse. Also staying away from heavier foods.
Ive had awful morning sickness, only thing that has helped me get rid of it is marmite but I dn't knw if u guys have that in USA?? Apparently the vitamin b12 in it eases sickness, was taking vitamin b12 tablets but they didn't help weird :-S