/g/, what is the best non-wired way to increase the range of a router? I've heard two routers are better than 1 router+extender, is this true?
Get stuck into modifying/replacing the antenna.
You can buy 2.4GHz Yagi antennas for $20.
You can make reflectors and/or directional antennas at home.
Just do a google search.
Have a free parabolic for WRTg.
Lock-in a lower data rate. This will increase the effective receiver sensitivity. The other option is to design/buy a RX/TX amplifier. In this case, you need to make sure that it is high linearity for highly dynamic modulation schemes like OFDM.
There is no good way to extend the range with more wireless devices. You want two WLAN access points which are both wired. If the WPA2 passphrase and SSID are the same on both APs then your clients will roam between them.
Get one of those power line extenders. You plug a single cable into the adapter which will be plugged into the socket right next to where your router is plugged in and then you plug the other adapter somewhere else in your house and it'll extend the wifi range. It uses the power line in your house as an ethernet cable between the adapter next go your router and the adapter which is somewhere else in your house which is pretty neat