One of the things that has really improved the Toughbook performance for me was to use a different wireless antenna for the 802.11 a/b/g/n adapter. The two top edge antennas under the black plastic trim of the lid are "OK" for sitting in a hotel room but not too good for grabbing a connection from the parking lot of the nearest McDonalds or Starbucks. I installed two "Taoglas" antennas under the black plastic side trim of the lid (where the coax cables run). In a semi controlled environment...
CF-30 CF-31 WIFI Thread
CF-30 CF-31 WIFI Thread