There are many products out there that claim to help you bake your cakes level. I like using a combination of 3 methods. I always bake my cakes on a baking stone. The stone helps the cake bake evenly so that it comes out more level and very moist. I also rotate the cake 180 degrees halfway through the baking process. This also helps the cake bake evenly because I do not have a convection oven. Finally I put at least 1 flower nail in each cake. The nail heats up and helps bake the middle of the cake the same as the edges. By putting these three methods together, much less cake is wasted.