Let me preface this with a few words WHOA LOOK BEHIND YOU MAN! Did you look? I knew it! There you go. Misdirection.
Chapter 2: Concealment:
Watch Pulp Fiction. Captain Koons talking to Butch about his grandpa's wristwatch is all you need know.
Chapter 3: Stagecraft.
See Chapter One. Do something while they're not looking. If someone looks while you're doing whatever it is you're doing, kill them. Claim they were terrorists.