Today, Earth Hour takes place. By turning a lot of lights off all around the world, attention is being brought to the environment, light pollution and the use of electricity.
For Earth Hour, it's only fitting I'm not recommending something to purchase, but rather a service to prolong the usage of that which you already own. That service is your local Repair Café.
A Repair Café is a place where volunteers work to fix broken appliances, electronics, computers, clothes, bicycles etc. What is being repaired at your local Repair Café, and when it takes place, can usually be found on their website or in local newspapers. Not all Repair Cafés function in the same way, but most of them ask only for a voluntary donation in exchange for their repairs.
On the website of Repair Café International, you can find a map with Repair Café locations in your area.