Change administrator passwords and usernames regularly.
Take advantage of WEP/WPA encryption feature in your network equipment.
Do not forget to change the default SSID of your router.
Enabling the MAC address restriction of your router is a must.
Using dynamic IP addresses may not always be a good idea.
While these basic tips are more than enough to get you started, keep in mind that your network can never be too secure. Always keep your security systems updated, and continuously learn and apply latest security configurations that are recommended by experts.
