One of the small pleasures I've discovered since being an attorney is writing a brief letter or email that concludes with "Please advise." Like the opener "Gentlemen:" there's something nicely formal about "please advise," and yet it gently but firmly conveys "this is your problem, and the ball is in your court, buster" while also saying, "I'm standing by, ready to help, when you've done your part." It's a nifty little phrase. It pleases me to use it. Please advise.