when my wireless card is set to monitor mode, it keeps wlan0 and sets mon0 to be monitor mode.

Whenever I see the forums/how-to's the examples use wlan0 etc as the interface, my question is this -

If I am connected to my work router using wlan0 and want to run sniffing / SSL programs such as:

Wireshark
Ettercap
Dsniff
urlsnarf

Should I be setting my interface to use wlan0 or mon0?

Regards,
Gingbeard