I had to throw something together quickly last night for an office party today, so I just used a few fast techniques that don't require any "wait" time: painting, minimal fondant work, and swirly roses. (Branches were painted with food color thinned with vodka, and then berries, birdy, and snowflakes were cut from fondant). Super fast cake.
This means that you are are Super Skilled Decorator with artistic talent!