This is the recipe I grew up with. I'm not saying it's the best recipe out there, but it's simple and tasty.
2 cups flour
1 teaspoon salt
1 tablespoon baking powder
2 eggs, beaten
In a small bowl, mix the dry ingredients. Add the eggs and enough milk to make the right consistency of batter.
For waffles, you want it kind of thick - like milkshake consistency. Otherwise it'll run right out of the waffle iron.
For pancakes, you want it fairly thin - like cake batter consistency.
If you're making waffles, you could add two tablespoons of cooking oil to the batter, but I prefer to leave the oil out and just spritz the waffle iron with some cooking spray.
When we make waffles, we always top them with fruit (hubby doesn't like syrup for some odd reason, so he puts jam on pancakes but wants fruit on waffles). We either use the little cans of frozen, sweetened, sliced strawberries, heated up, or apple pie filling, which we try to can a bunch of every year. But you can eat them however you like them!