To debug EIGRP use debug EIGRP packets as opposed to debug ip EIGRP events. EIGRP was originally designed to route multiple protocols including AppleTalk, IP version 4 (IPv4), IP version 6 (IPv6), and Novell Internetwork Packet Exchange (IPX), which is why the later debug command exists.

Cisco IOS filtering

In Cisco IOS there are a few ways of filtering IOS output to show only the information you are searching for. For example when looking at the input and output packet counters on an interface you could do one of the below.

Show interface g0/14 | in packets input|packets output
Show interface g0/14 | in packets (input|output)

Restarting Cisco Prime Infrastructure services

To restart the Cisco Prime Infrastructure services, establish a SSH connection to the Prime server and follow the steps below.

Step 1 Open a CLI session with the Prime Infrastructure server (see Connecting Via CLI).

Step 2 Enter the following command to stop the Prime Infrastructure server or appliance:

PIServer/admin# ncs stop

Step 3 Wait for the previous command to complete.

Step 4 Enter the following command to restart the Prime Infrastructure server or appliance:
PIServer/admin# ncs start

LAN/WLAN High availability

To ensure you have HA, from your access switches have one etherchannel uplink from the top stack switch and another etherchannel uplink from the bottom stack switch. 

In your wireless environment, spread your access points across all stack switches so if one switch is to fail, you haven’t lost complete wireless coverage. Position acccess points in a way to cater to this. 

Wireless controller AP migration

Recently I did a wireless AP migration from dual WLC5508 to dual WLC5520. There is not a lot of documentation out there on preference options for access points to join the controllers eg DNS, DHCP etc.
To create a pilot group on the new WLC, we were able to tell some access points to join a specific controller. In the access point High Availability options you have to specify the name of the preferred WLC and IP address.