Kitchen

put a lid on your pots when cooking
use pots that have the right diameter for your stovetop
turn off the stove before the food has cooked through to be able to use residual heat
use an electric kettle to heat water
let frozen food thaw in the refrigerator
avoid pre-heating the oven
set your refrigerator temperature at 5 to 7°C
do not put hot food in the refrigerator
do not leave the refrigerator door open for long periods of time
set your freezer temperature at -18°C
defrost your freezer regularly
in case of a prolonged absence, empty and turn off the refrigerator
wait until your washing machine and dishwasher are full before using them
use the "eco" setting on your dishwasher
do not leave the tap running continuously while your washing the dishes or washing fruits and vegetables
make sure taps are closed well to prevent them from leaking
keep a bottle of water in the refrigerator instead of letting the tap run until it is cold
try to reuse water (leftover water at the end of a meal can be used to water your plants or fill the sink when you're washing the dishes)
drink tap water and avoid buying bottled water