For days like this when you're not paying attention and want to shutdown your DEV VM, but repeatedly doing a "sudo poweroff" on your production server instead. About the 3rd time it told me my password was wrong I realized which VM I was in. :)
10:33 pm on Dec 9, 2013 (gmt 0)
AKA: be careful - you might get what you ask for.
sudo make me a sandwich!
8:37 am on Dec 10, 2013 (gmt 0)
Another thing I do is customise console prompts to remind me what I am logged into.
I always use lots of red in the prompt for an account that controls a live site.
5:09 pm on Dec 26, 2013 (gmt 0)
I do the very same, graeme_p. Color coded command prompts to remind the ID10T behind the keyboard which server and login being used.