1) Ginger
We like to use ginger in as many forms as we can.  Ginger ale works, but be sure that you're using a brand that actually uses real ginger, not just ginger flavoring.  You can also boil a small bit of ginger root in water and then add some honey or sugar to sweeten and drink the water.  Be sure that you taste it a bit first because ginger root is a very strong flavor, and you may need to add a little bit of water.  You can also make your own ginger cookies (try a quick Google search; there are lots of recipes). I have also found that ginger snaps that I've bought at my local dollar store do the trick just fine.  It's also important that as with any natural remedy, you watch for an allergic reaction to the ginger if it's your time using it.

Motion Sickness

2) Acupressure Bracelets
There are special bracelets that use the acupuncture approach of applying pressure on the pressure points on your wrists to keep you from getting motion sickness.  I had a co-worker that used to get motion sickness all the time, and now he's able to boat and fly and can even read in the car with this bracelet.  Try looking at your local health food store for them.  If you can't find them there, you can always look online or in a pharmacy.
 
3) Slushies
Ice (or anything cold, really) tends to help me a great deal with motion sickness.  I use this simple natural remedy whenever I'm at the amusement park and start to feel a little motion sick from riding too many rides.  Try this; it really works for me!
 
4) Saltine Crackers
I feel like motion sickness can be caused by excess acid moving around in the stomach.  To absorb this acid, I always keep some Saltine crackers and eat them whenever I start feeling a little bit of motion sickness starting.  My daughter tends to get motion sickness as well, and this works really well for her, too.
 
5) Vitamin B6
Three days before you travel, increase your intake of vitamin B6 (I use a pill form, and start taking it a few days before).  
 
6) Olives and Lemons
During the first stages of motion sickness, your body will produce excess amounts of saliva.  This is what you swallow and then become nauseated from.  Instead, try eating olives.  Olives produce chemicals called tannins that will make you mouth dry.  Lemons will also have the same effect on your saliva production.