Seeing as the last two years have been severely lacking when it comes to holiday decorations (it’s always wearables/holdables), here’s an early list I can link you to next time.
Retro X-Mas Decorations:
1: Plastic mold light up lawn ornaments.

2: Retro Ceramic trees

3: Ornaments (No pic needed, you know what ornaments look like)
4: Ceramic Village Pieces.
5: Bubble lights
6: Holiday lanterns
8: Retro plastic 3D wall hanging art.
9: Stair/Slide toy things (If you feel ambitious and wanna make an animated item)
10: X-Mas light nets.
I currently use pngs of lights for trees and bushes, these would be nice for decorating, as light strings only do straight lines. Could have various types (sizes) and scalable to get bigger/smaller lights. A flat version and maybe a rounded one for trees?