Storage used to be gauged in megabytes, but now gigabytes are the standard. If you already have devices that require these ports, make sure they are included. If not, it shouldn't be much of a concern, as most newer devices don't require them. A graphics card with at least 8 megabytes of video memory is recommended. Consider at least 16 megabytes if you're a big computer game user.
Most computers come with a basic sound card that is fine for most users.
Consider a better pair of speakers and a subwoofer if you plan to listen to a lot of music on your computer. A CD-ROM and floppy disk drive are basic requirements. A DVD drive is only something to consider if you either want to watch movies on your computer or if you plan to connect your computer to your television. Also consider a Zip drive if you share files with others who prefer to use these disks. Also consider a pre-built system from your local retail computer superstore.