Flickr Photo by Andy Melton
Having decorations organized makes holiday entertaining less stressful. Use large plastic stackable bins to hold decorations for each holiday. Label them accordingly (Halloween, Thanksgiving, Xmas, Hanukkah) and stack boxes with the labels facing out in the garage, basement, or attic. If there is more than one box per holiday, be sure to be specific on the label so you don't have to open multiple boxes to find what you are looking for.
Wreaths. To prevent crushing, store in a wreath box or wrap in a large plastic garbage bag and hang on a wall in the garage, attic, or basement (with a nail under the top and bottom to retain the wreath's shape).
Light strings. Take an empty wrapping paper tube and cut it in half. Wind the lights around the tube. Cut a slit in either end of the tube and stick the ends of the light strings in the slit to prevent the lights from unraveling. Use a piece of masking tape to label one end of the tube and specify where the lights go (tree, mantel, along the roofs, etc.) to save you the effort of having to figure it out each season.
Ornaments. Protect delicate ornaments in padded ornament boxes with dividers to prevent them from bumping up against one another. Use shredded paper in each compartment to keep ornaments in place. Wrap extra-fragile ornaments in tissue paper and use a resealable plastic sandwich bag for ornaments made with glitter or dough.
For more cleaning tips, check out What's A Disorganized Person To Do?