The typefaces entry features seven tips for using typefaces well. My favorite bit of advice: “A font is a tool, not an amusement park ride.”
The piece on living happily with a designer is some great wisdom for how to communicate on design projects. So often that communication process is just ugly. Perhaps the best advice is the retort, “You can’t tell me you’ll know it when you see it.” More often than not most problems with design projects could be avoided by better and more thorough communication up front.