This is one of the most important things I've learned in my career- after a meeting where any kind of requirements are decided upon, just write up a synopsis an

This is one of the most important things I've learned in my career- after a meeting where any kind of requirements are decided upon, just write up a synopsis and email it to all parties and say "Here's what we decided, let me know if I got anything wrong." 99 times out of 100 it's immediately forgotten but there have been a few times when I've been really really glad to have a contemporaneous record of a meeting.