learn by others mistakes

chatting with fellow campers last week on a site, the conversation came around to what mistakes were made when we were first touring. These are some that were mentioned,

1. didn't know the plug had to be turned to get electricity

2. forgot to unclip the breakaway cable

3. switched on the water heater before the water tank had filled 

I'll leave it to others to add to the list....but on a serious note I hope this helps the new people