Roadtrip,
Your post reminds me of something my old 727 FE instructor (yes, many years ago) drilled into our brains: turn something ON before you turn something OFF (Of course this doesn't ALWAYS apply, which is why the "do something GOOD" saying is probably more appropriate ... but you get the point)
The other one was: if you flip a switch, confirm the action i.e. make sure that the switch did what it was supposed to do.
No finger-pointing here ... just passing along two common-sense principles which can help prevent systems switching errors.