Do you have a laptop or desktop? If it's a laptop, the easiest way would be to get a usb wirless adaptor - something like this:
http://www.tp-link.com/lk/products/details/cat-11_TL-WN823N.html (there a loads of options on the market)
If you have a desktop, then, again, you could get a usb adaptor or an internal pci express wifi card - something like this:
http://www.tp-link.com/lk/products/details/cat-11_TL-WN881ND.html (again, (there a loads of options on the market)