Donated cooking oil to make nitro glycerin and other explosives.
Donated rubber tires to be recycled for tires for the military uses.
Donated pots and pans and other metals to be recycled into planes and other military armament.
Purchased many Billions of War bonds to fund the war.
Gave up driving very much so the gas could be used for the military.
Gave up food luxuries so the troops could get food and the UK could get food.
Made clothing, grew vegetables and fruit, swapped old clothes around, started thrift stores, held bizzarres to sell clothing and other goods (raised money for the war bonds and recycled the clothing this way).
Put up dark, black drapes to block out light so the Germans could not see targets. (in the United Kingdom).
Cooperated with the rationing program.
Gave up their sons, fathers, brothers, uncles and cousins to fight and die.