Yahoo had this on their front page

It's a good reference for me so when at the kids house I will fully understand what I am doing if I so choose to help out :-)
1. Load large items at the sides and back of the dishwasher, so that they don't block water and detergent from reaching other dishes.

2. Place the dirtier side of dishes toward the center of the machine to provide more exposure to the spray. Don’t let dishes or utensils nest, or rest side by side, which can prevent water from reaching all surfaces.

3. Use the top rack for plastic and delicate items that are dishwasher safe.

4. Rest glassware on prongs to prevent breakage. And to prevent chipping, make sure that china, crystal, and stemware don’t touch other items. Don’t machine-wash brass, bronze, cast iron, disposable plastics, gold-colored flatware, gold-leaf china, hollow-handle knives, pewter, tin, or anything made of wood or with a wood handle.

5. Load silverware with handles down but place knives with the handles up. If your dishwasher has an open basket, mix spoons, forks, and knives to prevent them from sticking together.

6. Place items with baked-on food facedown and toward the sprayer in the bottom rack.