100 guests? Craziness! Fun though - but lots of work.
I have my online shop on mysupermarket and keep removing things as I pick them up elsewhere. That way I should have everything listed that I need when it comes to ordering the fresh stuff. That's the plan...
I have the turkey which is something. Going to make the cranberry sauce this weekend or before, fingers crossed. Desserts will be made Christmas eve for my sins and the biscuits will be made with our daughter the day before that.
I'm making mince pies but also buying some. I'm making filo pastry ones (with frozen pastry). Just one thing with mince pies, if you're going to buy them make them good buttery pastry ones not the mr Kipling ones which aren't good at all! For years I didn't think I even liked them then tried a luxury supermarket one and liked them a bit too much 
As for our turkey, by fancying up the turkey I mean making it special. Making the stuffing for it and other various things (as per Jamie Oliver) to make it good. Hopefully.
May just have to give everyone extra wine should it not be fabulous...