I havent had any naesea at all, i was very worried, however the doc said not all women get it, and my mum never had naesea with any of her 6 kids, so i think im taking after her...thank god :P
I have however had severe intergestion, especially at night, and when i go to bed.

The doc reccommended to eat dry sao biscuits, and flat lemonade. (this works for both severe naesea and intergestion)
She said if you do suffer bad morning sickness, its best to keep a packet of dry crackers, right next to your bed, and as weird as it sounds, in the morning, sit up and eat 2 or 3 crackers before you even get out of bed.
That way the crackers settle on an empty stomach, and eliminates stomach acids which is all related to naesea and vomiting.

Just another handy hint.