[Azred]

The number one thing you can do to secure your home wireless network is to turn off the SSID broadcast so your network doesn't show up on quick scans of available networks in the area. I also recommend using a WPA2 password; you can write this password down and sticky-note it to your computer because the only way someone could get to it would be to break in to your place.

There are other things you can do--MAC address filtering or limiting the IP address range given out by your router--and these take very little effort but they aren't intuitive unless you browse through all your router's configuration screens.