I learned to drive on a stick shift, and my dad always downshifted when slowing. I had one friend who would leave it in gear till the last second, like 4th or 5th, whatever he was in, and you could feel the car allllmost buck, but he didn't have a tach in his car. Never believed me that he was REAL close to stalling!
Anyway, I always downshift. I blip the throttle, but don't double clutch, it unloads the tranny, makes it slip in faster. Also matches revs, so you don't really have to ride/slip the clutch much at all.
Also, like someone said, tap the breaks! Or gently put a toe on the rear brake, so it lights up for the turkeys behind you.