Add 1 extra egg
Replace water with milk
Use buttermilk instead of water
Add 1 to 2 tablespoons of sour cream
Add 1 to 2 tablespoons of mayonnaise
Use melted butter instead of oil
Add an extra 1 to 2 tablespoons of oil
Reduce baking time slightly
Do not overmix the batter
Do not overbake the cake
Brush the baked layers with simple syrup
Cover the cake tightly after cooling
Store the cake in an airtight container
Add pudding mix to the batter
Add an extra egg yolk
Use coffee or juice for chocolate or flavored cakes
Add a little applesauce
Bake at the correct oven temperature
Let the cake cool in the pan briefly before removing