One of the coolest features of Windows Vista is ReadyBoost. It allows you to expand the memory on your computer by plugging in a flash drive; your computer will use that space as extra RAM, allowing you to use more programs at once. It's a cheap and easy way to juice up the performance of your computer.

The problem with this, at least on laptops, is that USB thumb drives stick out from your computer. This makes them awkward, and you're always worried about snapping them off while moving your laptop around. The Apacer ReadyBoost Flash Drive takes care of that problem by plugging into your laptop and then lying flat against it. It can rotate around, allowing you to choose the perfect orientation, getting your extra boost of memory without having to deal with a drive jutting out from the side of your computer. The largest, a 4-GB version, will set you back $84. — Adam Frucci

Product Page, via Everything USB