To tape packages (!!!), ready to send in mail, especially outside Norway.
I get panic if something's gonna happen to it...because I often send chocolate to my American sweetie...(not that chocolate is such a big waste, but I once ordered chocolate from America and the whole package was smashed...!)
I love ductape, I just feel sorry for those who's gonna open it to get the content
Also to tape my lamp to the wall, I COULD use screws, but I move it around so much, that taping it to the wall gives the same angle.
NOTE: My cousin did actually use a VERY strong ductape, over his lips, resulted bloody lips and fleshy print on the tape.....