-Change the oil in your air compressor, and now would be a great time to automate the tank drain or make it easier on yourself to manually drain it.
-Open up the welder and blow the dust and muck out of the inside. Same for anything else in the shop with a cooling fan.
-Replace the half used up grinding stones on the bench grinder. Same for that wire wheel that's been flinging out wires for a year now.
-Sharpen chisels and drill bits. Clean up the mushrooming on the ends of punches while you are at it.
-Check and repair or replace any loose hammer heads.
-Replace key chucks with keyless, or make sure you have the proper size keys at hand.
-Gather up damaged or failed tools for replacement, especially screwdrivers.
-Lube ratchets and ratchet wrenches.
-Inspect tie down straps and take damaged ones out of service.
-Inspect chains for stretching or other damage, replace hooks and hook safety catches as necessary.
-Find or make a spot for wheel chocks, and buy or build a set to keep there.
-Wax drawer sliders or lube ball bearings.
-Fix the wiring on your trailer. Grease the bearings while you are at it.
-Just throw away the mostly used up saw blades you have stashed around everywhere, including the dull pos that's been on your circular saw since the Clinton administration and the bent Sawzall blades rattling around in the case. Put a new blade on everything.
-Clean the lenses in your welding helmets. Replace pitted safely lenses.
-Consider getting kid size protective gear if you have them in your life. If the kids have safety glasses or gloves that fit then they will work better, and the kids will be more likely to use them.