Having a gigabit network connection at home makes it possible to transfer your files very fast, for example to and from a NAS device. While WiFi is of course much more in the news in recent years, the development surrounding wired connections hasn't been standing still. You can buy switches that offer a full-duplex bandwidth that's 10 times faster than gigabit. While the new standard has been around for a while now, the Netgear ProSafe XS708E is one of the first 10 Gbit switches that can be called relatively affordable.
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips