Printers are a great example. If you look at yours, it'll have an EnergyStar sticker on it, which means it's designed to go to sleep to save energy and ink when you're not using it. If you power it off on the other hand, it will take all the ink in the printhead (about eight pages worth) and dump it into a sponge called a "printer diaper". And then, when you power the printer back on the next time you want to print something, it'll prime the printhead by squirting on average, another four pages worth of wasted ink.