A banana will be your best friend. It’s portable, requires no preparation, delicious, fills you up, and is great to eat after exercise as it contains a lot of potassium which helps you to restore your electrolytes.
Eat fruits that interest you. There is no point in eating only lettuce and salads just cause it’s healthy if you hate it. Eating food is one of life’s finest pleasures, as with everything it’s moderation we need to be aware of. So eat different fruits from time to time, try a different cultivar of apple, try that plum you’ve never tried before, try a strange fruit from the ethnic section of your grocery store if you have one.
Eating a variety of fruits and vegetables is a good idea because each food has a different amount of vitamins and minerals. If you are eating a variety of fruit you will have no need to take a multi-vitamin.
The trick with healthy eating is to make sure you have a healthy snack available, so that you do not turn to eating cookies just because “they are there”. So take some time the night before to make up a little bag of vegetables you like, and bring that to your volleyball camp for a snack. Or bring an apple along just in case you need an extra snack, so that you do not choose to buy something from a vending machine.
Drinking water is always important when you exercise. I personally do not believe in the 8 cups of water a day myth, instead I drink water when I’m thirsty. If you drink a lot of soda or juice, try replacing it with water from time to time. When I make canned juice I always add an extra can or two of water, it’s much nicer than the super-sweet juice it is “supposed” to be. And having a chilled bottle of water in the fridge ready for you to drink is always a great thing when you come in from exercising!