Resetting ECU???

I am having troble with my car idleing really low, i want to try easy things first, like resetting the ecu, can somebody tell me exactly how this is done? BTW i did try to search and find the answer but couldnt, help is appreciated!

search harder

http://www.g2ic.com/tegtips/engine/5.html

http://www.g2ic.com/forums/showthread.php?t=53345&highlight=resetting+ecu

http://www.g2ic.com/forums/showthread.php?&threadid=53236&highlight=reset+ecu

http://www.g2ic.com/forums/showthread.php?t=7033&highlight=resetting+ecu