4. Credit card warranty

Know the protections your credit card offers, and always make large purchases with a card that offers some sort of buyer protection.

Don’t always rely only on the store’s warranty. If you bought your item with a credit card, check the credit card company’s policy on warranty coverage. Many Platinum, Titanium, and Adamantium credit cards will automatically offer extended warranties for items that were purchased with the card. You can find out what kind of consumer protection your card offers by calling the 800 number on the back. For that reason, it's a good idea to make major purchases, like that new 30-inch monitor, with a card that offers purchaser protection.

5. Research independent PC manufacturers

If you’re not buying a PC from Dell, HP, or one of the other big boys, you’ll want to see what kind of track record your vendor has. At a minimum, your due diligence should include checking the Better Business Bureau at bbb.org. A second level of protection would be to check consumer complaint sites like Resellerratings.com. The site lets people evaluate stores and companies and compiles a quick score and lets you deep dive into the nitty gritty of the good, bad, and ugly of a particular store or PC builder.

6. Digital camera deals are dangerous

Beware too-good-to-be-true digital camera deals online! Unsavory online camera stores will hold your money hostage and gouge you for an included kit.

Digital cameras will likely be a hot item this Christmas, but cameras and online shopping can often end tragically. That’s due to the high number of borderline slimy stores that target digital camera buyers. It works this way: Your Google search for a Canon EOS 40D SLR yields an incredible price of $600! Wow, that’s $600 less than the other stores are offering it for. You order it and check out. Months later, you still haven't received your camera. You call the vendor, and you’re given a song and dance about it being back-ordered because of X excuse, would you like to buy the camera bundle with some accessories for $1,700? It's a lose-lose situation. If you fall for the upsell and actually receive your camera, you’ll notice that your package bundle, which you paid extra for, includes the battery and charger (which are normally included with the camera for MSRP). If you give up and cancel the order, you've wasted a ton of time, you don't have a camera, and the company has had your $600 for three months. If you foolishly let them cut you a check instead of getting your credit card company to reverse the charges, you’ll get to play the “where’s my check game?”

The short story is that there is no way in hell any store can sell a camera for half of what other legitimate stores are selling it for. But they know that greed works every single time. Just follow the old adage that if it sounds too good to be true, it probably is.

7. White box deals can be great, but know the dangers

Not all components are created the same. Top-tier components are full retail items in fancy boxes designed for store shelves. Theyusually include the full enchilada: all of the accessories, documentation, and the full warranty. One bin down is the bare component. These are often called OEM items, but that isn't always the case. Sometimes these bare items are considered full retail parts by the manufacturer and carry the full warranty–you just don’t get the fancy packaging or maybe the free T-shirt or software bundle that the retail part had. The riskiest item to buy is the OEM component. These are parts made and sold to PC assemblers and builders. Sometimes they carry shorter warranties or no warranty at all. They may even vary greatly in specifications from the components you read about online. They may have less cache or lower clock speeds or be missing key components that you wanted. The bad news is that it's extremely difficult to tell the difference between OEM parts and bare retail components; sometimes the reseller won't even know.

This applies not only to hardware but software as well. If you buy a retail copy of Windows, you can move it from machine to machine, reactivating it over and over again through several hardware upgrades. Hardware upgrades aren't a problem, even if you swap out every component in the rig. You may have to reactivate by phone after the second or third reinstall, but it will continue to work. If you buy the less expensive OEM version of the software, you'll have a problem. Microsoft has the option of limiting OEM copies of Windows to the motherboard that it is first installed on. If your motherboard dies, Microsoft technically considers your copy of the OS dead and can and has in the past, refused to reactivate it for a different motherboard.

Got tips of your own? Share them in the comments.

CC licensed thumbnail icon courtesy of Flickr user Roland. Check stand image courtesy of Flickr user Clean Wal-Mart. Credit card image courtesy of Flickr user The Consumerist.