Rechargeable Batteries
$9.99 to $45.99 with Charger

AA Batteries reign supreme in the video game console realm, powering just about every wireless accessory out there, from traditional controllers to plastic guitars.

And with more and more accessories coming out all the time--the latest Tony Hawk brings with it a wireless motion-sensitive skateboard--one can never have enough batteries, especially when they have so many other uses around the house.

While you're shopping and comparing prices, be sure to consider charge times. Depending on the charger, they can vary from fifteen minutes to six or more hours.

Virtual Currency Cards
$19.99 to $49.99

With the abundance of games and other virtual goods being sold as digital downloads these days, a virtual currency point card is a safe bet for anyone with an online-connected console.

While it may not seem like much compared to the $60-plus cost of a retail game, a $20 currency card is enough for a downloadable game or two and something to breathe new life into one already owned--a new mission, more maps, additional songs, etc.

The trick here is get the right card. Xbox 360 uses Microsoft Points, the PlayStation 3 and PSP use PlayStation Network, with Wii and Nintendo DSi using Nintendo Points.

Logitech Harmony Universal Remote
$99.99 to $399.99

You may think that the last thing you or a loved one needs is another remote. You'd be wrong.

See, the Logitech Harmony isn't another remote. It's the remote. An online database of over 225,000 devices ensures that these babies can control pretty much anything. The days of individual remotes for each device--stereo, television, cable box, etc.--are over.

On top of consolidating countless remotes into one, the Harmony makes it ridiculously simple to control the various devices. While it used to take multiple remotes and actions to turn on your television, receiver, Xbox 360 and then flip the television and receiver to the proper channels, the Harmony can do all that with the press of a single button.

Of course, such convenience doesn't come cheap. The remotes range in price ($99.99 to $399.99) and shape (from a traditional remote to a 3.5-inch touch screen), with all but the lowest-priced model packing rechargeable batteries for additional convenience.

You'll also need a PC or Mac to set it up, and a $59.99 accessory if you want to use a Harmony with a PlayStation 3, as Sony's system lacks an IR receiver. But as someone that's been using a Harmony for years now, trust me when I say it's worth it.