JK Rowling has hidden a lot of clues in OotP

JK Rowling has hidden a lot of clues in OotP that tell us who is going to die before they actually die! However, it takes a cunning eye to spot them...

• On page 60 of the American edition of OotP just as they enter 12 Grimmauld Place, it says "The other's hushed voices were giving Harry an odd feeling of foreboding; it was as though they had just entered the house of a dying man."
• On Harry's first night at Grimmauld Place, the entire house sits down to dinner. In total, 13 of them eat together. According to Trelawney in PoA, when 13 people dine together, the first one to rise is the first to die. No prizes for guessing who rises first here: "Sirius started to rise from his chair." NOTE: This is arguable as Ginny is not sitting at the table at the time, but she may be counted as "being" in the room and eating with the others, thus it can still count as foreshadowing.
• Sirius' house is 12, Grimmauld place. The Grim is a sign that death is coming. -Thanks Kristin
• When Fred and George were levitating dinner onto the table at 12 Grimmauld Place, they lost control of one of the knives. It dropped and embedded itself into the table right very near Sirius. This could be foreshadowing Sirius' death.
• On page 462 of the UK version, it says "Harry had an unpleasant constricted sensation in his chest; he did not want to say goodbye to Sirius. He had a bad feeling about this parting; he didn't know when they would next see each other." This speaks for itself; the part about them never seeing each other again was true in the end.
• A lot of people say that Sirius' animagus form (big, black, shaggy dog) is uncannily similar to the Grim and so his death was coming from when we first met him in PoA.
• In chapter 9, Sirius says, "It's a matter of time before Voldemort moves into the open; once he does, the whole ministry's going to be begging us to forgive them. And I'm not sure I'll be accepting their apology." Why? Because he's dead by then. -Thanks LizzyBeth.
• In Book 1, Chapter 15, when Hagrid, Harry and Hermione run into the Centaurs, Ronan makes the pronouncement "Always the innocent are the first victims." Everyone thought Sirius was guilty, but he turned out to be innocent.
• On page 477 of the American edition of OotP, Sirius says "This is how it is-- this is why you're not in the Order-- you don't understand -- there are things worth dying for!"
• In St. Mungo's, when they are going to visit Mr. Weasley- 'They climbed a flight of stairs and entered the "Creature-Induced Injuries" corridor, where the second door on the right bore the words 'DANGEROUS' DAI LLEWELLYN WARD: SERIOUS BITES.' If you put these words on a sign, they would read
  
  Creature-Induced Injuries
  Dangerous
  Dai Llewellyn Ward
  Serious Bites
  
  Take the first word of each of these and what do you get get? Creature Dangerous Dai Serious? No - Kreacher dangerous, Die Sirius...
• In the American book, the first page shows the book title and an illustration. There is a picture of Sirius' animagus form leaving 12 Grimmauld place. It shows that Sirius would be leaving something; in this case, it was life. -Thanks Elz P
• Page 20 of the UK edition: "the darkness pressed on his eyes like a weightless veil." This looks like foreshadowing to me! -Thanks Adam
• Sirius calls Harry, Ron and Hermione to call him "Snuffles." To snuff it means to die, foreshadowing the death of Sirius.
• On page 741 of the american version, about in the middle of the page, Kreacher says, "Master will no come back from the Department of Mysteries!" he said gleefully. "Kreacher and his Mistress are alone again!" He meant this literally. -Thanks Jess
• On p.75 of the US version, Molly Weasley says: "The meeting's over, you can come down and have dinner now, everyone's dying to see you, Harry." This is very unlikely to be a death clue, but I thought I'd mention it all the same. -Thanks Sila