A lot of things occurred when making repairs that you have to keep track of.
Like faucets opened to drain a system.
You turn the water back on and forgot to close that one faucet that had a slow sink drain. As you walk back into the unit the water is overflowing onto the floor.
The one that bothers me the most sometimes is screwing a threaded nipple into a fitting inside a wall. You can't see it to see if it is leaking when you turn water back on. I can only whisper to myself "Hope I don't get that call about something leaking in the wall"
I cleaned a laundry drain through a stand pipe once. I must have knocked out the drain tube form the water softner. Later that night, it cycled and flooded the guys home. Hard wood floors and cost my boss about 30K. He likes me, I'm still working for him.
You've been doing it for 23 yrs. You must have some stories of your own.
I try not to loose any sleep over it. $hit happens.
Check, double check and then check it again. I can be very forgetful about things but I try to focus on what I am doing when I'm working. Especially when I'm burning something inside a wall.