Digital or physical!
Digital - Photos, files, accounts, and stray programs/apps
Physical - Wash curtains and/or blinds, clean out clothes you don’t wear, go through the drawers especially junk drawers. Clean if you don’t often; refrigerator, bed sheets, carpets, car, baseboards and ceiling fans, microwave, stove. Do maintenance on machines around the house like dishwasher and laundry machine. If homeowner check other places like pipes, gutters.
Phones, laptops and desktops. Full reset or reinstall ISO
Which is also a wonderful chance to try out a new Linux distro
Maybe a bit ethereal, but take out a compass and see which way is north, south, east, west. Where is the ocean, the mountains, where does the sun set and rise and which way do prevailing winds blow? How does energy flow through your space and how can you enable its flow. Burn a candle and see which way it dances.
Tend a plant or two, start a compost bin and remove any items which have psychological baggage like unwanted gifts and photos.
Also, clean the blades of the fan if you have one, it’s amazing how dirty they get.
sweep and mop floors and dust windowsills and other dusty places