If you are super talented you can level your cakes with a serrated knife (knife with little teeth on the blade) or if your like me and want to do it the easy way, you will need a cake leveler. The cake leveler is easy to use and has several height positions for cutting your cakes.
Wilton Cooling Racks are nice because they can be stacked on top of each other to save room!
Yes I forgot to take a picture of actually leveling them, but the leveler is soooooo easy to use! Don't forget to save the cake you cut off the top, you can mix it with leftover frosting and make cake pops or just eat it!
Before putting cakes on cake plate, put some frosting down. Think of your frosting like glue, it will help keep your cakes in place. Remember to put the top of your cakes facing down to prevent crumbs getting into frosting and to put frosting in between each cake.