Pre workout meal

Yesterday I talked about what would be good after your exercise, but what you eat before your workout is also important. What you eat before will affect your performance of your workout or activity. Again I got some useful information from the sportsmedicine.com website.
First of all exercising on a full stomach is usually not ideal. I never like to workout when I feel to full and I am sure most other people do not either. Food that remains in your stomach during an event may cause stomach upset, nausea, and cramping. To make sure you have enough energy, yet reduce stomach discomfort, you should allow a meal to fully digest before the start of the event. This generally takes 1 to 4 hours, depending upon what and how much you've eaten. Everyone is a bit different, and you should experiment prior to workouts to determine what works best for you.
One thing I learned is that you can have a liquid meal if you do need to eat before you workout because your stomach digests liquids faster.
The major source of fuel for active muscles is carbohydrate which gets stored in the muscles as glycogen in the days before exercise. Because glucose is the preferred energy source for most exercise, a pre-exercise meal should include foods that are high in carbohydrates and easy to digest. This include foods such as pasta, fruits, breads, energy bars and drinks.
However in the end, it comes down to how long you are eating before your exercise for what to eat. There are different things you should eat if its 4 hours before your exercise compared to what you should eat if its only and hour before your exercise. 
If you are interested in learning more about what to eat more specifically, I would recommend checking this page out: http://sportsmedicine.about.com/od/sportsnutrition/a/EatForExercise.htm