If you have a Wi-Fi router installed in your home, you're in luck since the moment you fire up your netbook, it will immediately search for available wireless network. After booting up, it will immediately connect you to your home internet network provided that you didn't give it a password. If you did, well enter it now to connect your netbook to the online world. Most if not all netbooks are capable of recognizing available wireless network within its proximity. This goes without saying that it is done automatically without the need to set up anything.
If there are several networks available, your netbook will prompt you to choose the network that you want to connect to. If there is only one available network within proximity, you netbook's OS will immediately connect you to that network.
Once your netbook's OS did its job and successfully connected your netbook to a wireless network, congratulations you can now enjoy browsing the web and do your usual online activities.