This part of Patrick's article is still great advice in that regard:
"This means you need what political scientists call a commitment strategy: you always, as a matter of policy, negotiate all offers. (In this wide world I’m sure you can find a company who still makes exploding offers, where you get one yay-or-nay and then the offer is gone. You have a simple recourse to them: refuse them and deal with people who are willing to be professionals. You’re not a peasant. Don’t act like one.)"
This I find to be a sticking point, and never forget: "You’re not a peasant. Don’t act like one."