Another nice feature when using the r8187 driver (the one from aircrack-ng.org) is the highpower mode.
First you have to enable highpower by setting
Then you can raise the transmission power by settingCode:iwpriv wlanX highpower 1
Y can ba a value from 0 to 35, be aware, that using high values might damage your stick. I've been using values from 25 to 30 without having problems so far. It's a great way to establish a stable connection to distant AP's.Code:iwconfig wlanX txpower Y