I find following this method gives good results when the chronic is under par. Take your nice smooth hit. Don't hoot it back quick, but don't drag it on forever, let it brew nicely. Once you have a full nice hit, take a quick suck in of air, almost like a tiny joint puff just to clear any last bit of smoke out of your mouth. Hold it comfortably. I find holding it until the piece is passed off to the next person is plenty, don't over-do it so your next breaths are gasps. 10 seconds I would say is a good ballpark. Then simply exhale at will.

Happy smoking and remember, make sure theres a lighter before packing a bowl.
~Bryan~