I do not own any room brooms,
But I may get a Browning BPS 12ga or a left hand 870 12ga pump in 2013/2014.
For shotgun tips & practical tactics, I would get the skill training DVDs or books of Massad Ayoob, John Shaw, Clint Smith, John Farnam, or maybe Louis Aweback(check spelling).
For books/videos, see: www.massadayoobgroup.com www.gunvideo.com www.paladin-press.com www.deltaforce.com www.nra.org
I would also suggest using the factory made LE brand 12ga loads.
Stay safe & stay legal...