Look inside your computer first

You don't have to look literally, but remember that a top computer peripheral is your memory, so know how much you have. Average desktop computers come with 512MB of memory, but if you can afford to go up to 1 or 2 gigabytes, do so. You'll be surprised at how fast your hard drive can fill up.

I recommend: After checking how much memory your computer has, go to a manufacturer’s website like Dell for memory module recommendations. A top computer peripherals distributor, New Egg, offers a variety of computer peripheral accessories.

Input with comfort

A keyboard tends to be a standard operating computer peripheral device in computer systems sold. What you may not know is that the keyboard that came with your computer isn't necessarily the best for efficiency.

I recommend: If you move around a lot or just don’t want the extra cords lying around, you might enjoy a wireless keyboard. Logitech specializes in wireless keyboards and mice. Ergonomic keyboards allow you and your employees to work in a more comfortable position to avoid carpel tunnel syndrome. Check out a PC World review of one of the top computer peripheral devices.

Consider combination computer hardware peripherals

Businesses often need printers and fax machines. Scanners are almost as important as printers. In recent years, all-in-ones have moved to the top of the wish list of computer peripheral devices.

I recommend: Hewlett Packard offers a variety of these all-in-one machines priced from $90 and up. The OfficeJet all-in-ones work for most businesses, but if you have specialized printing or scanning needs, take a look at the photo and laser all-in-ones.

Network your computers

Most computers come with an internal modem or PC cards to allow you to use e-mail and the Internet. If your office contains several computers, you might want to invest in a router for wireless networking, not only to connect everyone to the Internet, but also to share files and printers.

I recommend: One of the leaders in computer networking is LinkSys, but Mac people need Airport Extreme.

Shop for the best computer hardware peripherals at the best prices

After you decide what you want, it's time to get the best computer peripherals at the best price.

I recommend: Check reviews at Consumer Reports, paying particular attention to "best buys.” After choosing the top computer peripheral accessories that you must have, find the best prices at cNet.