[tomsthumb]

all of your bullet points are excellent advice, but:

having timestamps in my prompts has helped me straighten out what I did to get myself into a situation across a few different windows of a tmux session.

having all nonzero return codes show up automatically because of tweaking my oh-my-zsh configuration has definitely saved me time here and there.

root on my machines looks completely different visually compared to my regular user account(s) and this has stopped me from doing dumb things as root, again, while bouncing around in a tmux session.