PSA - You SHOULD know this
Updated: Apr 17
Every year for the last 9 or 10, I've sent this to everyone I know, so I guess this is a useful place

to put it too.
https://mariovittone.com/2010/05/154/
BTW... I shared this with an LA County Fire Chief I knew way back when and he found it massively useful and sent it to everyone in his organization, so... it seems useful.