1. ALWAYS, ALWAYS, ALWAYS check the sides and top of your cakes to make sure there is NO CAKE showing through!! I have my husband double check for me to make sure there are no spots where cake is showing through especially on dark chocolate or chocolate cakes! Oh and red velvet!!
This is VERY tacky looking! Don't be stingy with your icing! You don't have to KILL them with super thick icing, just "enough icing"! Making your icing thin enough to see through looks cheap and unprofessional!