SNMP Practical Use

Hi guys. I'm a long this fan, but this is the first time I'm posting. 

Since Qain is such a network wizard, can he do a video(ofcourse if he has the time, and is willing to) on SNMP and how can it be used to diagnose network problems. I am not talking about explaning what each object in the MIB does, but just give us some examples of what is good to use in some situations. I know this is a very specific area, and I understand if you don't want to do a video because of that.

Thanks.