Originally Posted by Wayne Davy
Another thing you can ALSO do so long as the Wifi Router supports it and, I believe, most do now, is to turn on tied MAC addressing. What this means is you connect your laptop to the Router (with WEP/Encryption turned on) and when it is successfully linked to it, you can set the Router to ONLY allow the MAC address of the Laptops WiFi card to connect to the router. Doing all of these makes it quite difficult for someone to hack you (though not impossible as BJ points out).