To make an awesome egg substitute for your cooking and baking needs, mix one tablespoon of ground flaxseed meal with three tablespoons of water. Pop it in the fridge for about 15 minutes to let it thicken up until it's gooey, then it's ready to use. If you need more "eggs" you just double/triple the recipe, and so on. This works great in things like muffins, cookies, pancakes, and burger patties.
In most recipes calling for egg substitute, you can use 2 egg whites in place of 1 egg substitute. Just break the eggs open and toss the yolks away. I know that sounds wasteful, but consider the price of egg substitute. The package of egg substitute usually has the equivalent of four eggs in it.