Changing your Wireless Network Name is the first step in securing your wireless network. Change it to a familiar name that does not contain any personal information.
If you are not utilizing Super G with Dynamic Turbo for it's speed improvements, enable Auto Channel Scan so that the router can select the best possible channel for your wireless network to operate on.
Enabling Hidden Mode is another way to secure your network. With this option enabled, no wireless clients will be able to see your wireless network when they scan to see what's available. For your wireless devices to connect to your router, you will need to manually enter the Wireless Network Name on each device.
If you have enabled Wireless Security, make sure you write down the WEP Key or Passphrase that you have configured. You will need to enter this information on any wireless device that you connect to your wireless network.