1 - Desperately needing to re-attach my rear light during a thunderstorm... cable ties, and a piece of wood, plus a strap wrapped around the wood when it proved too thin for the light bracket... (Something similar has been used again after the light fitting broke off on the last tour as well, which stayed in place for 6 weeks until we could replace the rear light)
2 - fire lighting during torrential rain (we were out of gas and meths and needed a natural fire for cooking,) - the used inner tubes cut into strips light amazingly well and we managed to find some dead vertical wood which was not quite as wet as the rest of the wood was... fire lit, food underway, no longer freezing cold from being wet through...
3 - washing up gloves (marigolds) in the far north of norway after a seriously wet spell when my waterproof gloves gave up totally and the weather was around freezing... too cold to cycle without gloves and my only other pair were fingerless - regretfully no photos! (Plastic bags had been the very temporary solution, but had issues like filling with water, but did work very well with keeping the wind chill off until you lifted your hands off the handlebars...)
4 - out of water, in an area that was sand, so the rain was draining away. Inverted tarp to Ortlieb water 'bucket' (tarp usually used to hide bikes), 20L collected in 10 mins or so (OK it was torrential rain, but water issues resolved). We have used this method more than once, just make sure the oily side (from touching the chains) is not the one collecting the water...
5 - plenty of self adhesive tyre patches - used for groundsheet/footprint repairs, waterproof trouser repairs, watertight bag repairs, but rarely inner tube repairs!