Here is another nugget to put in the bag and only can be done in the CLI of a WLC. Suppose you want to modify the duplex and speed of the ethernet side of an AP or all the APs for that matter. By default both the duplex and speed are set to auto. 
This is how -- drop down into the CLI of the WLC. This command lives under the <ap> catagory.
(Controller) config ap ethernet duplex <auto/half/full> speed <auto/10/100/1000> <all/Cisco AP Name>