Well, when your at home you can buy a wireless router and a wireless network card for your laptop. this will enable you to wonder around your house and be able to get on the internet. It can also be used for alot of stores (especially coffee shops and airports) that have Wi-Fi, and sometimes its free.
But if you want wireless internet on the road, then you will need to get a provider such as verizon or sprint, that offers a card that you plug into your laptop and you can get broadband speeds. These go for around $40+ a month.