Sell CDs and/or DVDs. Back up your collection on a computer or external hard drive, then sell the original discs. You’ll make quick cash and save space at the same time. If you have prized collections (boxed sets, limited-release editions, etc.), sell these individually for what they’re worth; otherwise, sell your discs very reasonably (remember, your potential buyers can also get the exact songs they want instantly by downloading them for buck or less apiece). Even for a mere $4 each, a sizeable collection of CDs can haul in a tidy – sum.
Normally you’ll be asked to test a few websites by visiting them and to document and record your reactions and thoughts as you go through it. It’s really easy to get set up making extra money online by testing websites. All you need to do is sign up to the following services: UserTesting.com, Userlytics, TryMyUI, Userfeel, TestingTime (UK only), or Side Income Jobs.
One of the cool things about Google AdSense is that it's so easy to get set up. If you have a blog or website, you can sign up for a free Google AdSense Account. From there, Google will give you a unique code that you will paste onto your website. Google takes it from there, tracking your page views, traffic, and earnings on your behalf. There is no upkeep or maintenance to get this thing going, which makes it a no-brainer if you have a website already.