At least half of all pregnant women will experience some form of nausea and/or vomiting during their pregnancy. It can occur at any time of the day or night, not only in the morning. Trying to eat a healthy diet can become very difficult when you've also got to deal with problems like having a very sensitive sense of smell, going off certain foods, craving others.... Here are some tips to help you to feel a little better.

• Ginger, teas, cookies, even the spice can be helpful in preventing nausea.
• Smaller frequent meals can also help keep an ailing belly at bay.
• Take a deep breath. It might be mind over matter sometimes.
• Comfort foods! Eat what you can, if it stays down it is probably a good thing. Slowly add more foods to your diet as possible.
• Sleep to avoid nausea. Hey, don't knock it until you've tried it.
• One mom swears by cold veggies soaking in water to help relieve the churning feeling.
• When possible avoid hunger, it can also make your stomach upset.
• Eat something high in protein before going to bed. Helps your blood sugar stay more level.
• Two crackers before your head leaves the pillow is old but wise advice.
• Have sips of ice water as the urge to purge strikes. Many women say that this helps them keep meals down as well.
• Avoid foods and smells that seem to trigger nausea. Sometimes this will be nearly every food or every smell.

Remember that not all of these will work for you. Worth a try, to see which work for you.
 
Source: http://pregnancy.about.com/cs/morningsickness/a/aanvp.htm