If you print a lot of documents on your inkjet printer at home, you've probably noticed that the costs of ink and paper over time are simply ridiculous—in some cases, they can exceed the price of your entire computer. After spending a weekend printing receipts for the accountant and completely depleting my $YS14.99 black ink cartridge, I've compiled the best ways to save money on printing costs (and compute greener at the same time).

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Good magazine has an interesting chart in their latest issue that details how much energy your vampire devices use, and how much it costs you to keep them plugged in. The guide differentiates between devices that are in "active" (ready to leap to life) and "passive" (just plugged in) standby modes, and some items are real shockers. A plasma TV, for instance, can cost about $160 per year just to keep plugged in. That Wii you got your hands on? $25 before you even hit one virtual tennis ball. The takeaway for me, at least, is thinking about putting some devices on power strips and turning them off if I know I won't be using them for a day or more.

As a proud participant in today's mass blogging event, Blog Action Day, we're devoting our special feature to Blog Action Day's topic: the environment. Last Monday, we put out a call for your best ways to live greener, and as usual, Lifehacker readers did not disappoint. We received quite a few green hacks in our inbox, and after much winnowing down, the best 10 suggestions made it to the top. After the jump, check out some easy ways to live greener, and vote on which hack is the best of the best.

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