This group has a website for surviving the holidays. You can google divorecare + holidays. It should populate in google for you. It has good tips, if you aren't "religious" or not.

Me: 41
H: 43
M: 21 yrs
DD: 15

1st bombshell: 2002 - 6 months
2nd bombshell/moved out: 10/03/2012
OW: 10/12/2012
Signed MDA & PP: 11/20/12; but not submitting
Confirmed OW living with H: 11/21/12