best/easiest application i've found is startup disc creator in your menu on mint 14. If the usb is plugged in the program will show it listed in the bottom half of the dialogue box on screen, (ignore the top part about iso's) just click on erase disc, say yes to are you sure and enter your pass if this is required, the usb should be done in seconds.
There's other ways and app's in package manager/software centre but this is just my favourite
Lenovo ThinkPad T61 LM16-64 bit Intel T7500/2.2GHz/Cinammon 1.8 Intel GM965. Toshiba Satellite M70: LM16-32bit. Desktop:LM13 Maya 64 bit, on new Intel 3.2ghz proc/asus MB/8gb RAM