I too have a waffle maker, and it's SO much easier than I thought it was to mix up the batter from scratch. Here's the recipe I usually use:
2 cups self-rising flour (or use all-purpose + salt & baking powder)
1 TBSP sugar
2 eggs
1-3/4 cups milk
1/2 cup vegetable oil
1 tsp vanilla
Mmm, sounds good right now!