I'll try to list a few things I personally used in the last 11 days since Irma with no power.
5 gallon bucket-seat,step ladder,trashcan,picking up yard debris,washed a little laundry
Tin foil-besides cooking,under candles for fire protection and behind for reflection,rigging a tv anntenna
wire-rigging the anntenna,propping up plants,makeshift clothesline,hooking invertor to car battery
Duct style tape-too many to list
empty water bottle-refill and freeze for ice,cut bottom for funnel,poke hole in cap to spray gas in carb working on a genny
solar lights-recharge batteries for radio and flashlights
This is just a few things I actually did and not pulled off the net