Get yourself some space to build and store things.
I don't know what they have for this year (hopefully no frelling tree for you to build) but there are usually bins by the dozen.
You're going to need someplace to put them where they won't get damaged.
Fight for some space and make sure everyone knows about it.
The more pre-prep you can get done the better.
Do an inventory, make sure you have everything. It's no fun to have to deal with ETL's who are missing signs they were told were supposed to have.
Speaking of ETL's, do your best to keep them out of your boxes - in that way lies madness.
After you do your inventory if you are missing anything order it.
And while you are at it order extra ceiling hooks and peghooks (well mostly the plastic pegs).
Have a long talk with your SFT if you haven't already.
It's good to know what they are up against and how they can help.