Hey, just so you know ... this post is now about 25 years old. Please keep that in mind as it very well may contain broken links and/or outdated information.
Having a home network is very cool and convenient, but having to switch back and forth between my main PC and my laptop on the same desk was getting to be a pain, literally. The placement of my laptop on my desk left no room for my legs and was causing me to hunch over … not very ergonomic. I decided it was time for a KVM (keyboard-video-mouse) switch and ended up with the Linksys KVM100SK: a two-port switch kit that contained the switch box and all the cables needed to hook up two PCs, all for under $100. It was a snap to setup and doesn’t need an external power supply (it draws power from the keyboard connection). You can switch between the two PCs using the button on the switch, or by pressing the CTRL key twice. It also supports autoscan. Now I can control both my PCs from my main monitor, keyboard, and mouse.