Turning off faucets that are not being used.

Parts from old cellphones used for repairing other phones

Resoling worn-out school shoes.

Scraps of paper and old newspaper transformed into newsprint

Donate old clothes to local charity/shelter

Instead of throwing away all the empty water container, Nathan used them as pots for plants.

Ana makes a compost fit in their backyard for dried leaves and peeled fruits and vegetables.

Printer cartridge refilled with ink.

Sharing rides with family or friends who are going on the same destination.