Sewing projects: I made long bags for rolling the sails, sheet bags mounted in the boat to control line tangles, and a full cover. The last was in response to my boat turning yellow during pollen season.
I upgraded from a mast carrier on the transom to a light bar. I have done this on a couple of other boats back when light bulbs on trailers failed after submersion, when connections would fail, and when my dog de-wired a trailer. Maybe not needed with LEDs but it is bright and very visible.