I am so sorry rusty, I also felt the loss of my parents very deeply and was so grateful that I didn't have to put my mum into care, so I know exactly where you are coming from. The pain will ease in time and hopefully next year you and your wife will be able to celebrate Christmas again, and remember the happy times spent with your parents.
As far as getting ready for Christmas I am slowly getting there, just have to buy one more present which is an easy one, wrap one other and get my head around the food. It's all the little extras that you have to remember to buy, in fact I will be heading out soon to see if I can get some extra pork crackling, it has been impossible to get this year for some reason. Wish me luck!