Thank you Josieann and TillyTrotter!
I try to be organised, so I don't stress too much - which I am prone to doing!
One other tip is to take photos of your decorations in place. Print them out and either add into the box of decorations for the relevant room, or put in a ring binder. I print mine out ( x4 to an A4 sheet) and keep in plastic pockets at the front of my Christmas file ( where I also keep notes on what goes where ,what worked/didn't work this year, gift lists, and meal plannings/timings). Use the photos as a guide next year, saves having to think - "where does this go?"
Hope this helps, take care xx