jecasc - 11:11 am on Dec 20, 2011 (gmt 0)
It seems you are understaffed. You should hire some additional help next time to help you during christmas time.
I was reluctant to do so in the past myself, because I feared it would be more of a burden than help, because usually it takes some time until everything goes smoothly with new staff. But this year I did and let them do jobs only that do not require any training. Only packaging, no picking, not anything else.