Here are a few ideas from her list to get you started:
-Add a "stocking stuffer" to your inventory
-Build you inventory
-Order materials - boxes, mailers, etc.
-Get a stack of custom forms and delivery confirmation forms
-Prepare your holiday shop announcement
-Change your policy page -update shipping dates, returns, and exchange policy
-Work on your photo's so they are your best
-Order your postcards, thank you cards, and holiday cards
-Decide on any sales you will be offering and put them in your marketing calendar
-Write you holiday blurbs for Twitter, Facebook, etc. so your not always trying to think of something new when you are short on time
-Determine you advertising budget and renewing budget to help you stay on track
This is just a few of the highlights, view the whole list in her post Online Seller, Start your Engines: Are you Ready?
What is one thing you doing to prepare for the holidays?