What belongs in your procedure packs and what's just taking up space and costing you money? The short answer: Items that are used 90 percent of the time belong in your packs. But how do you get to that magic number? And — as your case mix, your surgeons and their preferences change — how do you stay there once you get there? That answer's a little trickier, so we surveyed your colleagues to find out what's worked for them.