I've got to say that Puck's "How to Map your Electrical Circuits is excellent"
I did mine differently.
For those of you who don't want to turn everything off because things such as the heater, AC, refrigerator etc,, etc. won’t run while you have the breakers off until you get to that particular one. Here is how.
Leave everything on.
1) Get someone to help you. You & your friend are referred to as #1 & #2
2) Use a 2 way radio (walkie talkie), less than $20. Better yet borrow it from the kids or neighbours.
3) Have a floor plan for every room with you and something to write with. Or draw it as you go.
4) Circuit tester.
4) Start at the farthest room of the house and work back to the panel.
With the WT, pencil floor plan and tester in hand.
#1 turns on everything in the room tells #2 to begin.
#2 begins turning off breakers.
When something goes off #1 tells #2 “Mark” “Stop” whatever.
#2 tells #1 which breaker it is & #1 marks his FP.
#1 then checks all outlets & switches. If #1 finds a live outlet/switch. #1 notifies #2 to begin again. Continue until all outlets & switches in that room has been identified.
Now move on to the next room and so forth.
When #1 is finally back to the panel. #2 closes it while #1 locks the house & turns on the security.
They then head down to the local Pub to congratulate each other on a fine job.
BTW Something that is too often overlooked are the switches & outlets themselves.
When you start this project & turn everything on in the room. First check all the switches & outlets before tripping any breakers.
If you don't a faulty switch or outlet will ,,,,,,,,,,,,,,,,*%#()&&%. Well you know.