They don’t even have to be your bottles: Plenty of people are too busy or lazy to bother returning a six-pack worth of beer or soda cans for 30 cents and simply leave them out for curbside pickup. It may not be trash day in your neighborhood, but it surely is somewhere. Fill up a 50-gallon trash bag with cast-off cans, and you can redeem them for about $12 – it’s just a start, but you can do it again and again, and all it takes is time and hustle.
If you have more internet bandwidth than you know what to do with offer to share with your neighbor for a small fee. Label your SSID (the name of your WiFi network) something like “Visit apartment 207 for internet.”  If you have fiber optic internet at 50 to 100 mbps you could possibly rent up to 15 people easily and still have lots of bandwidth. This is a great way to earn money fast.
Keep your costs down. In order to turn a profit on what you're selling, choose to sell an item that's inexpensive to make. Lemonade is a classic because all of its ingredients (water, sugar, lemons or lemon juice concentrate, and ice) are fairly cheap and easy to obtain. Popsicles are another favorite because they can be bought in large quantities from the store!
If you spend a lot at Amazon.com, for example, you can get a card that rewards you with 5% cash back on Amazon purchases -- which can really add up. Stores such as Target, Costco, Gap, Lowe's, TJX, and Wal-Mart also offer cards. Plenty of retailer cards offer 3% to 5% in cash back or discounted prices and many offer other perks, too, such as free shipping. If you travel a lot, travel-related credit cards can help you rack up lots of points and rewards that can be used instead of cash, keeping more cash in your pocket.

Get paid to search the Web. Sites like Swagbucks.com and Zoombucks.com will pay you to use their online interface to search the web. To qualify, you need to be willing to download their search bar and use it for everyday Internet use. The only caveat that comes with this “gig” is that you might be paid in gift cards instead of cash. If you can parlay those gift cards into items you need to buy anyway – like groceries or gas – searching online can be a lucrative way to spend your free time.

I recently stumbled on the Trim app and I have to say, this one is a game changer. It’s a simple app that acts as your own personal financial manager. Once you link your bank to the app, Trim analyzes your spending, finds subscriptions you need to cancel, negotiates your Comcast bill, finds you better car insurance, and more. And of course, the app is free! My bet is that it will only take a few days for Trim to put an extra $100 in your pocket. So easy!
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