The world's biggest online flea market, eBay.com (EBAY) is still one of the best Internet options for cleaning out your garage, and turning years worth of disused items into cash. And of course, it's a great place to buy for less as well.
Love eBay but having trouble selling your $5 coffeemaker... with $10 shipping? Put that Mr. Coffee on craigslist.org, and see if there mightn't be a neighbor just down the street who's willing to walk over and hand you a five-spot. (And, it's great for the other side of those transactions too.)
eBay auctions aren't for everyone. Some people prefer the straightforward purchase-and-sale approach on Amazon.com (AMZN). Some people like Amazon so much that they shell out $79 a year for an Amazon Prime membership, and free shipping. But did you know that Prime also lets you stream free movies over the Internet, straight to your computer, smartphone, or Internet-enabled TV?
If you've got a kid in the house, or are planning to host one in the new year, here's another Amazon option to try. Sign up for Amazon Mom (free for the first three months) and Amazon will give you an extra 15% discount on baby-related items such as diapers and wipes.
Is Junior having trouble mastering the art of multiplying mixed numbers? Think you might have to hire him a tutor? Save some money and visit KhanAcademy.org instead. Former hedge fund analyst Sal Khan (hint: he's pretty good at math) will teach your kid to add, subtract, divide, and multiply -- for free. When you're done, have Khan explain how the U.S. Electoral College works, why the Greek debt crisis is important, and how a black hole works, too -- also all for free.
Two heads are better than one, and thousands of eyeballs have a better chance of spotting a great price on a flat-screen TV or a plane ticket to Hawaii. On Slickdeals.net you can peruse the findings of thousands of online deal-hunters.
For investors, Finviz.com offers the easiest-to-use, most complete -- and free! -- stock-screening program out there. It's also got a great financial news aggregator, "heat maps" for the stock market, insider-trading reports, and other financial toys.
Did the share price of one of your stocks just jump (or take a dive), and you have no earthly idea why? Chances are, somebody on Wall Street just upgraded (or downgraded) it. Briefing.com will tell you whodunit.
Oh, you want to know why the analyst upgraded (or downgraded) that stock? Click on over to StreetInsider.com. As the name suggests, they've got the behind-the-scenes Wall Street scoop.
One of the best ways to avoid spending money is to avoid temptation -- for example, by preventing telemarketers from calling you with suggestions on how to move your money into their pockets. A few minutes on the federal government's DoNotCall.gov website can shut off the flow of those calls forever, and make for more peaceful dinnertimes at your house, to boot.
Marketers don't just phone, of course; they also weigh down your postman. But a few clicks on OptOutPrescreen.com can do for your junk mail problem the same thing that DoNotCall.gov does for your unwanted phone solicitation problem, by shutting off the flow of unsolicited insurance and credit card offers to your mailbox.
While you're at it, why not complete the trifecta? DMAchoice.org puts you in contact with the Direct Marketing Association, and lets you tell its thousands of members: Don't contact me; I'll contact you. Maybe.
The Internet is full of websites that will sell you a copy of your credit report for $9.99. But why pay money for information that can be yours free in the first place? The Fair Credit Reporting Act entitles you to request, totally free of charge, one credit report from each of the three major credit reporting bureaus once per year. AnnualCreditReport.com will get you started.