My sunroof on my blazer is duct taped, the shield over my driver side window is duct taped on, I keep a roll of it in my truck in case of emergencies, works great on water hoses that spring a leak and you can't get to an auto parts store immediately.
Christmas presents get wrapped in duct tape, wrapping paper, bigger boxes... Took my girls between 15 - 20 min each present to unwrap
Shoes, temporary repair to coop, shower, chairs.
Made a portfolio for my drawings and stuff when I was taking some art classes out of two pieces of foam board, and duct tape - even has handles.
Book covers.
Plastic pool repair.
My DD is a camp counselor and they have a dinner where the counselors have to dress up formal, or have to wear a trash bag if they do not bring a formal dress, so I made her a trash bag/ duct tape dress as she was not going to take the $100, david's bridal clearance rack, covered in fancy beadwork, very expensive to dry clean dress.