There was a recent tweet that said something about looking something up rather than trying to remember it, because by trying to remember can reenforce incorrect information.

I’m starting to write long command line stuff on index cards, or writing bash scripts for them because if I try and do it from my head, I usually need to take a couple tries before I get it right.  Looking it up saves time, and gives you the right answer first time.

I wish I could remember the original source of this thought!